Nisplay has been a global pioneer in the portable tennis machine industry. 5. 00 USD. 0:56 . BATTERY POWERED – Typically operates eight to ten hours on six new ‘D’ size batteries (not included). 9. Looking for a good, reliable ball machine for under $1000. Have one to sell?When you imagine a tennis ball machine, the Spinshot Plus-2 is probably not what you expect. Nisplay N1 is one of the smallest and most stylish tennis ball. Hover to zoom. Designed for ease and practicality the Nisplay N1/N2 ball machine simply sits in the grooves on the oscillator tray. It has 9 options: 4 topspin, 4 backspin and a flat shot. As a pressureless tennis ball, it lasts dramatically longer than a pressurized ball resulting in less waste. 3) Removable battery (so I can charge and leave the thing in my vehicle) - Yes. Orange Lob-ster tennis ball machine. The Best Tennis Balls for Hard Courts. The 26-pound ergonomic design makes it lightweight, and it is just as large as a basketball. Condition: New New. (#2) Tennis Cube w/oscillator for $779 that I found on Amazon. FREE Delivery Across Burundi. Collection in person. Ball ejection speeds up to 60+ MPH. EASY Returns & Exchange. Sold Out - Notify Me When It’s Available. $6752 ($0. Brand: Generic. Nisplay N1 - Avocado Green $899. 15"H x 12"L x 13"W. Nisplay tennis ball machines can hold up to 100 tennis balls, allowing you to train for extended periods without having to stop and reload the machine. Easy to install. Designed for maximum durability, the battery-operated Elite One offers an unparalleled 4-8 hours of court time. 00. Lobster Sports: Small Tennis Ball Machine. They have a versatile product line-up for every player level. Nisplay N1 - Portable Tennis Ball Machine $819. #1. Plus, the lithium-ion battery's excellent endurance ensures I can train as long as I want without interruption. . Nisplay N2 - Portable Tennis Ball Machine. Sep 8, 2021. Finally, the Simon X can be adjusted to feed balls between 1. $300. EASY TO TRANSPORT: The Nisplay tennis ball machine is easy to transport in your car. . Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Luxembourg. Throws a ball every five seconds. Orange. FREE Delivery Across Guam. 8lbs with Battery. Maybe you reserved a court and the person you were supposed to play with canceled. Read honest and unbiased product reviews from our users. FREE Delivery Across Chile. Nisplay N1 - Avocado Green. Nisplay Sports LLC (“Nisplay”) extends the following limited warranty, which applies only to regular use of the Nisplay Ball Machine (as described in more detail below) for the purposes of practicing or teaching Tennis (the “Limited Warranty”). Your transaction is secure . Thank you Coach Rob and Patrick for t. Introducing the Proton - a modern tennis ball machine. 2. #tennis #tennisballmachine #tennisplayer The Nisplay Oscillator is a game-changing device adding horizontal ball oscillation to the Nisplay N1/N2 ball machine. Today I took it on the court for a successful and enjoyable hour-long practice session, about 300 balls fired in total. FREE Delivery Across Botswana. Nisplay Tennis Ball Machine - One of The Lightest and Smallest Ball Machines. As one would expect from a tennis ball machine priced below $1000, it does not come with fancy drill options. In short, it saves battery life and keeps me from having to take extra trips to manually turn the machine off and on. EASY Returns & Exchange. Discover how our customers practice with Nisplay Tennis Ball Machine featuring the Horizontal Oscillator: Great day for practice, Nisplay tennis ball machine #nisplay #tennis #tennislover. FREE Delivery Across Trinidad and Tobago. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Cook Islands. FREE Delivery Across Yemen. Lobster Sports Spin-Control Ergonomic Tennis Ball Machine. It can deliver quick shots or slow lobs with equal accuracy, and there are 12 programmable presets that allow for customized training. 0 1. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Mauritius. M. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Bangladesh. 10 Best Tennis Ball Machine Reviews 2022 In the US - Black Friday 2023 . Save 9%. 🌟 This compact yet powerful machine is designed to cater to different needs, making it a. Click SHOW MORE below to click ahead to the machine you want to learn about. Nisplay Review by Tennis Spin Check out Tennis Spin's review of Nisplay Tennis Ball Machine on YouTube. EASY Returns & Exchange. Click to play video. Please call 800-448-8867 or submit an email inquiry to CustomerService@SportsTutorInc. Reviews say that Wilson and Sports Tutor is a trusted brand in the USA. The Tennis Tutor is one of the best portable tennis ball machine product lines that you can get for the money. Color. Find many great new & used options and get the best deals for Nisplay Tennis Ball Machine at the best online prices at eBay! Free shipping for many products!. 1) Portable - Yes. Nisplay N1 is one of the world's smallest and most stylish tennis ball machines. Nisplay designs and manufactures tennis ball machine. Videos for related products. Thread starter soodster;Spinfire Pro 2 (v2) Tennis Ball Machine – Includes Remote & Choice Of Power Option. Sports Tutor Tennis Cube – Best for Beginners. Nisplay tennis ball machine can shoot ball at 1 - 10 seconds frequency, with max speed at 68 MPH and elevation all the way up to 50 degrees, which could be a perfect machine to practice moon balls. FREE Delivery Across Macedonia. Transparent chute with computer-controllable ball-feed mechanism. Click to play video. Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery Brand: Nisplay 1. Through countless days and nights of trial and error, endless discussions, and thousands of attempts, we finally developed the Nisplay N1 - the world's smallest, strongest, and most stylish tennis ball launcher. The big selling point of the Lite model is its portability and Spinshot pushes this primarily as the best portable tennis ball machine. Nisplay Lightweight Wheeled Tennis Ball Machine. You simply can’t do that with the lobster. 9 different spin rates for topspins and backspins are really a wide range. 0 bids · 6d 9h left (Wed, 11:03 PM) or Best Offer. . In Stock: Yes. As someone who has been away from the tennis court for over 40 years, my recent decision to rekindle my. Ball ejection speeds up to 60+ MPH. So far, with limited use, the Nisplay ball machine seems quite adequate for practice drills, although I have not tried it at the high range of speeds. 30. 4cm) Launch speed: 10-45 mph (16-73 km/h) Battery: Lithium lasts 3. 3. We'll explore its key features, performance, and how it can take your tennis game to the next lev. Read More. New. For instance, in tennis practice, a closed drill occurs before. A ball machine that costs $600 is, at its core, just as good as one that's $2000. Scroll down to see unedited reviews from over 175 Verified Purchasers, which is a very small fraction of our customers. 4) Silent Partner Pro $1400. Ball Capacity：80+. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Uzbekistan. List: $899. Meike Babel Tennis . FREE Delivery Across Albania. New Listing Isam Tennis Machine Used With Remote Feature Turns On Not Tested. Whether you are a beginner or a pro, you will find the Spinshot Plus-2 Tennis. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in GERMANY. 3. M. 6’’x12. When folded down it is 29 x 21 x 15. Vea opiniones y calificaciones de opiniones que otros clientes han escrito de Nisplay Máquina de pelotas de tenis portátil (26 libras) – Motor dual para TopSpin y Backspin, más de 80 pelotas, máximo de 68 MPH, más de 4 horas de juego con batería de litio externa (máquina de bolas) en Amazon. Holds 28 balls. comThe lightest and smallest tennis ball machine in the world. Quantity: 9 available / 1 sold. Its sleek and portable design (26lbs) ensures effortless transportation and quick setup on any court. S. They're 75% slower than a standard tennis ball and can help. FREE Delivery Across Mongolia. The Resale Value of Tennis Ball Machines: W hile the upfront cost of a tennis ball machine might seem steep, remember that it's not just a purchase – The resale value makes it an investment. Club player-Henry So from Hong Kong. Sold Out. Amazon. Tennis Ball Machines, Tennis Stringing Machines, Tennis Balls, Wilson Tennis Balls, Dunlop Tennis Balls, Unbranded Table Tennis Balls, JOOLA Table Tennis Balls,You can take the machine with you wherever you go, whether it's to the tennis court, your backyard, or the park. It will last a lifetime, and its full programmability options will accompany you on your journey from amateur to professional. Things to consider when buying a tennis ball machine. EASY Returns & Exchange. We review the Playmate Volley, Proton from Hydrogen Sports, Lobster Elite 3, Spinfire Pro 2, DKSportbot, Spinshot Player & Slinger Bag. Quantity. From what I see and tested on this product, great little compact machine!A number of improvements have been made over the original machine. Discover the power of Nisplay Tennis Ball Machine. Its the world & smallest, strongest, and most stylish tennis ball launcher. Products made in. Tennis Tutor Plus Ball Machine. #1. Maybe this would be a more affordable and convenient tennis machine than Spinshot and Hydrogen? It can do both top and bottom spin; any thoughts? Price: $829. 00 USD. Delivers shots randomly across the court for hitting on the run. Color. Nisplay N1 is one of the smallest and lightest portable tennis ball machines in the world. The Spinfire Pro 2 [v2] offers things you would normally only find on a much more expensive machine. Rated 4. The battery isn't really a big deal (you could wire it in yourself for $40 or so if you're electronically handy), but the handle *is* useful. Home / Products. Fully Programmable Drills, 120 Ball Capacity, Easy Transport, Free Phone. Videos for related products. Portable Tennis Ball Machine NISPLAY . View Sports Tutor Tennis Twist on Amazon. EASY Returns & Exchange. $40. Read honest and unbiased product reviews from our users. +. 00. Plus, the large basket allows you to fill 80-100 tennis balls. shadow01, I hope you have a clear idea of how you are going to use the ball machine. 00 Subtotal;. Ideal performance on all court surfaces. The machine offers a variety of play modes, including throwing, baseline low ball, volley, forehand, backhand, overhead, and baseline. See chart below for MORE MODELS. Trend Question Official Event Official Column Opportunities Organization. 75 by Afterpay Afterpay Info. Nisplay N2 - Portable Tennis Ball Machine $998. Spin: Topspin, backspin. Free shipping. This machine is topnotch and an unbelievable value. 1 min readShop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Canada. Color. The Bad: Only 2-3 hours playtime; Final verdict: The Spinshot Plus-2 is among the top tennis ball machines on the market. Their goal was to make tennis more accessible and enjoyable for everyone. 12. In this video, we put the nisplay ball machine to the test. 150, a lower top speed of 68 mph (109 kph) vs. Get special offers, deals, discounts & fast delivery options on international shipping with every purchase on Ubuy Serbia. Change The Game. 3. Tennis ball machines reviews. Weighing only 26 lbs, this machine is incredibly lightweight and portable. Nisplay - Portable Tennis Ball Machine Oscillator for N1 and N2. Don't miss out on the Black Friday smash! Get $100 off our tennis ball launcher. Table-mount dimensions: 14"L x 16"W x 18"H. Spinshot Lite Tennis Ball Machine. you set the machine to hit the ball as close as you can to the net. Weight. It's seemingly a lot more portable. Sports Tutor Child-Safe Beginner Tennis Ball Machine. Add to Cart. This item: Spinshot Pro Tennis Ball Machine (The Best Model for Easy Use) $99900. uses Ryobi Battery. Click to play video. . 0 out of 5. It offers personalized practice sessions and is easy to assemble and disassemble. Feed Frequency: 1-10 seconds. The battery-powered variant requires six D-sized batteries that will easily get you 5-10 hours of play time. Revolutionary design can customize your drills and program height, direction, spin, and speed with a dual motor design. you set the machine to hit the ball as close as you can to the net. Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery. This machine is topnotch and an unbelievable value. Item is out of stock. EASY TO TRANSPORT: The Nisplay tennis ball machine is easy to transport in your car. With its consistent and precise ball delivery, versatility in shot selection, programmable drills, and convenient portability, it has the power to transform your training sessions and take your game to the next level. FREE Delivery Across Canada. Holds up to 110 balls. FREE Delivery Across BAHRAIN. It can also hold up to 150 balls at a time, which is a. Holds 28 balls. EASY TO TRANSPORT: The Nisplay tennis ball machine is easy to transport in your car. Upright the machine measures 29 x 43 x 15. Slinger Bag Grand Slam Pack. "With this model you get a small and durable machine. Natalie M . $200 useful all together - tough call, but I'm enjoying my SP star right now. 18. Things to consider when buying a tennis ball machine. Rated 4. ATP; WTA; Our website has affiliate links. The best tennis balls for clay courts: Wilson Roland Garros Har Tru Clay Court 3 Ball Can. The ball capacity is also good, although a little on the low end, as it can hold about 150 balls. Try your own drills! For the purpose of reliable and consistent feed, the ball tosser/feeder do not offer as. Nisplay Overgrip Tape $7. Furlihong Baseball Toss Machine, Adjustable Launching Angle and Speed, Extendable Stacker, Powered by Battery or AC Adapter, for Baseball Training. com: Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and BackSpin, 80+ balls, Max 68MPH, 4+ Hours Play with External Lithium. Revolutionary design can customize your drills and program height, direction, spin, and speed with a dual motor design. Review this product. Their goal was to make tennis more accessible and enjoyable for everyone. User Reviews. Spinshot-Pro – Best Value. Sale. Technical Specifications: Ball Feed Speed: 10 to 80 mph (16 to 130 kmph) Ball Feed Interval: 2 seconds to 12 seconds Ball Capacity: 150 balls Programmable Drills: none Phone Compatibility: none Battery life: 2 – 4 hours Battery charging: 12 to 15 hours for a fully charged battery Weight: 35 lbs (16 kg) Dimensions: Height: 21 in (53 cm) Length:. It’s. It seems dumb, but two trips from the car is a deal breaker. Designed for ease and practicality the Nisplay N1/N2 ball machine simply sits in the grooves. Nisplay N1 - Classic Red $899. This gives you choices regarding what to train and adds some variability to your sessions. 00 $99. It comes with an easy to use control panel and a random oscillator, so you can keep players on their toes! This is the most powerful portable tennis ball machine you can buy, and is. It's seemingly a lot more portable. Traditional tennis practice can be time-consuming, involving rallies and downtime between shots. FREE Delivery Across Cook Islands. 00. One of the best things about the Nisplay tennis ball machine is its affordability. With its state-of-the-art technology, the Nisplay Tennis Ball Machine offers customizable ball speed (0 -68 MPH), spin (flat, top and backspin), and oscillation options, catering to both beginners and seasoned players. Get special offers, deals, discounts & fast delivery options on international shipping with every purchase on Ubuy Comoros. 00 USD. Furlihong . Check Price at Amazon: 9: Sports Tutor Tennis Cube w/oscillator - Most Compact Portable Tennis Machine. 0:56 . Sep 01, 2023 TennisNisplay Nisplay Tennis Ball Machine Review: A Game Changer for Tennis Enthusiasts As someone who has been away from the tennis court for over 40 years, my recent decision to rekindle my passion for the sport was driven by the desire to play with and teach my grandsons in California. The dual motor design allows for various modes of practice, including topspin and backspin, making it suitable for both beginners and experienced players. With its consistent and precise ball delivery, versatility in shot selection, programmable drills, and convenient portability, it has the power to transform your training sessions and take your game to the next level. $2,000. New comments cannot be posted and votes cannot be cast. EASY Returns & Exchange. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Macedonia. PatrickB. EASY Returns & Exchange. Images in this review. Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max. 5’’x10. FREE Delivery Across Bangladesh. The Spinfire Pro 2 looks much more modern. 00. Your Cart is Empty. However, the machine is designed to work best with pressureless tennis balls, as they tend to last longer and produce a more consistent bounce. $79. 6’’x12. 00 2 Cases 72 Slinger Triniti Tennis Balls (by Wilson): $200. 0 out of 5 stars 1 rating Nisplay is dedicated to exploring the ultimate experience of technology and sport. Made in USA by #1. S. us. The Nisplay Tennis Ball Machine is thoughtfully designed to provide unmatched convenience for players of all ages and genders. For the. . Its oversized wheels and 3. Free case of Tretorn Micro-X Ball with purchase. A few downsides compared to the Lobster Elite Three and Spinfire Pro 2 include a smaller ball capacity of 120 vs. The review! How I TestTraditional tennis practice can be time-consuming, involving rallies and downtime between shots. The lightest and most portable tennis ball machine. Tourna Ballport Deluxe Tennis Ball Pickup with Wheels - Blue. You can check them out at nisplaysports. Pre-Owned. With this vision in mind, they created the Nisplay N1, one of the world's lightest and smallest tennis ball machines. According to Tennis Companion, three of the machines we carry made it to their six best overall ball machines list: Lobster Elite Three Battery Ball Machine. Features to consider when choosing a tennis ball machine. A Tennis Tutor, another. Towing wheels and a retractable handle are incorporated on the machine and you can put all your tennis equipment on the machine and tow them together. Find helpful customer reviews and review ratings for Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+. We are committed to making it easier for more people to enjoy tennis. Transparent chute with computer-controllable ball-feed mechanism. Nispl. That’s quite impressive, right! You can customize your drills and program height, direction, spin, and speed for each of 6 sequential shots. The Spinfire Pro 2 makes it easy to practice a wide range of shots, test yourself with a variety of paces, spins and elevations, and build your mobility and fitness with practice drills. Nisplay Portable Tennis Ball Machine (26lbs) - Light & Small & Powerful. Item is in stock. Launch Angel. Spinshot Player Programmable Easy Store Tennis Ball Machine. The machine weighs 28lb and features caster wheels. The slinger bag was as expected in build quality and performance. Controls: Feed rate and speed knobs on the machine, remote control for on/off and oscillation. B0BSB7J969The Tennis Twist ball machine can feed balls between 10 to 20 mph (16 to 32 kmh), ranging its throws from 10 to 20 ft. Nisplay N1 - Portable Tennis Ball Machine. Start-up time delay. But Nisplay is more than just a brand - it's a community. Lobster Elite Liberty. Condition: New New. + Great for groundstroke practice plus lobs, especially if you're trying to fix any quirks in your strokes. Despite its advanced features and high-quality construction, it's priced competitively compared to other tennis ball machines on the market. EASY Returns & Exchange. $899. 5K views 1 month ago #tennisfitness #tennisdrills #tennislesson In this video, we review the Nisplay Sports Portable Tennis. The machine is a Little Prince, the basic model. 150, a lower top speed of 68 mph (109 kph) vs. Dimensions & Weight. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Practice with Horizontal Oscillator. Color. The machine falls in the price range of $1295. When you consider what you are getting for the money it really does seem like an attractive proposition. Nisplay N1 is one of the world's smallest and most stylish tennis ball machines. 00. 5. Whether you prefer a continuous stream of balls or intermittent feeding to simulate real-game situations, the Nisplay Tennis Machine offers versatile ball delivery options. Based on 11 reviews. How Nisplay Tennis Ball Machine Can Take Your Game to the Next Level. The Spinfire Pro 2 looks much more modern. Gamma Sports Pressureless Tennis-Balls Box, Bulk Tennis Balls, Premium Tennis Accessories. The Spinfire Pro 2 makes it easy to practice a wide range of shots, test yourself with a variety of paces, spins and elevations, and build your mobility and fitness with practice. Feed interval and height range satisfy even the most demanding players. Reviews. Read honest and unbiased product reviews from our users. Revisiting The topic of a good tennis ball machine. Reviews; Blog; Ball Machines; Accessories; Instruction; FAQs; Support; Warantty; Time to get excited about our new collection for Men!Why does my machine shooting ball so slow? Although I set FEED at the highest? Please be aware a smaller number on the FEED means faster serving. Links to the best tennis ball machine listed in this review video: 1. Tennis ball machines are a fantastic way to practice and improve your game, regardless of your skill level. The battery isn't really a big deal (you could wire it in yourself for $40 or so if you're electronically handy), but the handle *is* useful. Wilson portable tennis machin is for professionals and the people who play tennis seriously as a career. Login; 0. Launch Angle controlled via Elevation. It lets you easily browse the different shot routines. Weighs just 11 lbs. Such devices range from $650 to a few thousand dollars. Book reviews & recommendations: IMDb Movies, TV & Celebrities: IMDbPro Get Info Entertainment Professionals Need: Kindle. The Wilson portable tennis ball machine is a very interesting model regarding spin. Trying to find an affordable ball machine with most useful functions for growth. When folded down it is 29 x 21 x 15. . . Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Mongolia. Ball placement and speed was quite consistent. You can customize your practice sessions to focus on. 4cm) Launch speed: 10-45 mph (16-73 km/h) Battery: Lithium lasts 3. Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery. In this review, we’ll dive into the features, benefits, and overall performance of the Nisplay Tennis Machine. 6’’ and weighing only 26 lbs, this machine is lighter and more compact than any other ball machine with similar features. Check Price at Amazon: 10: TENSMA Tennis Ball Machine, TS-06, Smartphone Remote-Controlled, up to 150 Balls Capacity. The Lobster Elite 2 tennis ball machine is an excellent choice for medium to advanced players, as it possesses some of the higher-end features, without breaking the bank too much. The bag was delivered on time. Launch Angle controlled via Elevation. PatrickB. Such devices range from $650 to a few thousand dollars. You can customize the speed, spin, angle, and interval of the balls, and control the machine with your phone or a remote. In our analysis of 26 expert reviews, the Nisplay Lightweight Wheeled Tennis Ball Machine placed 5th when we looked at the top 6 products in the category. With its consistent and precise ball delivery, versatility in shot selection,. Whether you're looking to improve your game or have some fun on the court, the Nisplay N1 has got you. Shop Nisplay Portable Tennis Ball Machine (26lbs) - Dual Motor for TopSpin and Backspin, 80+ Balls, Max 68MPH, 4+ Hours Play with External Lithium Battery online at best prices at desertcart - the best international shopping platform in Serbia. You can customize your practice sessions to focus on. A few downsides compared to the Lobster Elite Three and Spinfire Pro 2 include a smaller ball capacity of 120 vs.