--- product_id: 7923997 title: "Beers ERT 300 Tennis Computer, Black" brand: "gamma" price: "₨104" currency: SCR in_stock: false reviews_count: 5 url: https://www.desertcart.sc/products/7923997-beers-ert-300-tennis-computer-black store_origin: SC region: Seychelles --- # Dynamic Tension Readout Precision Measurement Cordless Convenience Beers ERT 300 Tennis Computer, Black **Brand:** gamma **Price:** ₨104 **Availability:** ❌ Out of Stock ## Summary > 🎾 Elevate Your Tennis Game with Precision! ## Quick Answers - **What is this?** Beers ERT 300 Tennis Computer, Black by gamma - **How much does it cost?** ₨104 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/7923997-beers-ert-300-tennis-computer-black) ## Best For - gamma enthusiasts ## Why This Product - Trusted gamma brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Unleash Your Game:** Get real-time insights into your string bed stiffness and play style. - β€’ **Pocket-Sized Power:** Compact design fits easily in your bag for on-the-go analysis. - β€’ **Microprocessor Magic:** Advanced electronic simulation for highly accurate performance metrics. - β€’ **Universal Compatibility:** Works seamlessly with any racquet and string type. - β€’ **Battery Operated Freedom:** No cords, no limitsβ€”play your way without interruptions. ## Overview The Beers ERT 300 Tennis Computer is a cutting-edge device designed for tennis enthusiasts, providing precise measurements of string bed stiffness and play dynamics. Its pocket-sized, cordless design ensures you can analyze your performance anywhere, while compatibility with all racquets and strings makes it a versatile tool for players of all levels. ## Description Product Description New technology! Displays current string bed stiffness (dynamic tension), indicates the power and aggressiveness of play, and alerts when it is time to restring. Provides highly precise measurement through an electronic simulation of the ball impact. Pocket-sized, cordless, and easy-to-use. Works with any racquet and string type. Microprocessor controlled, battery operated. Manufacturer Contact Information phone: (800) 333-0337 email: sales@gammasports.com website: https://www.gammasports.com/ Review: A Great Product for Competitive Tennis Players... - ....and those who desire to play with the best condition equipment. These are not easy to come by, as they seem to sell out before you get a chance to grab one. I got mine and I won't let it go. What does it do? Well strings are like the cardio system of a tennis racquet. If the strings are not fresh, they don't snap back, and therefore they don't create the spin they did when fresh. This happens at differing times depending on the player, the amount of power they hit with, the racquet head size and flexibility, and the string pattern. Most regular players will see about 20-30 hours of play before the racquet becomes less playable, and given the next 10 or so hours the racquet is not playing to spec and the player will find their shots going long (not getting enough spin to create the downward force of the ball) or their kick serve not kicking up as it normally does. They start losing control, and most people will actually assume the problem is their own, and they begin to change their game/strokes, etc to accomodate what is actually happening with the racquet. This device the Beers ERT-300 helps you recognize your tension level, and monitor it as you lose tension. When the racquet gets to that 20%+ lost tension mark - you will find the racquet plays different. When it's at 25-30%, it is what the tennis stringing community calls "Bagged Out" and within a few hours after that (if you hit the ball with any amount of power) the string will have no more elasticity and it will break. So about 10-20 hours after the racquet stopped playing at optimal levels, most players will not make the change to fresh strings as they should, instead they play till the string breaks, all the while frustrated with how poorly they played this entire last week. Love this product, friends, customers, other players ask to have their tension checked. Works like a charm, it's my secret weapon! LOL Review: Garbage - It simply doesn't work 9 out of 10 attempts. Either fails to start a measurement or comes back with bogus values. For a tool this pricey it is a complete disappointment. ## Features - Displays current string bed stiffness (dynamic tension), indicates the power and aggressiveness of play - Provides highly precise measurement through an electronic simulation of the ball impact - Pocket-sized, cordless, and easy-to-use - Works with any racquet and string type - Microprocessor controlled, battery operated ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0007R8M2O | | Brand Name | GAMMA | | Color | Black | | Customer Reviews | 3.0 3.0 out of 5 stars (5) | | Date First Available | October 2, 2003 | | Item Package Dimensions L x W x H | 6.5 x 6.5 x 2 inches | | Manufacturer | BEERS | | Package Weight | 12.8 ounces | | Part Number | AERT | | Sport Type | Tennis | ## Images ![Beers ERT 300 Tennis Computer, Black - Image 1](https://m.media-amazon.com/images/I/610nfeXdCGL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A Great Product for Competitive Tennis Players... *by J***O on February 13, 2019* ....and those who desire to play with the best condition equipment. These are not easy to come by, as they seem to sell out before you get a chance to grab one. I got mine and I won't let it go. What does it do? Well strings are like the cardio system of a tennis racquet. If the strings are not fresh, they don't snap back, and therefore they don't create the spin they did when fresh. This happens at differing times depending on the player, the amount of power they hit with, the racquet head size and flexibility, and the string pattern. Most regular players will see about 20-30 hours of play before the racquet becomes less playable, and given the next 10 or so hours the racquet is not playing to spec and the player will find their shots going long (not getting enough spin to create the downward force of the ball) or their kick serve not kicking up as it normally does. They start losing control, and most people will actually assume the problem is their own, and they begin to change their game/strokes, etc to accomodate what is actually happening with the racquet. This device the Beers ERT-300 helps you recognize your tension level, and monitor it as you lose tension. When the racquet gets to that 20%+ lost tension mark - you will find the racquet plays different. When it's at 25-30%, it is what the tennis stringing community calls "Bagged Out" and within a few hours after that (if you hit the ball with any amount of power) the string will have no more elasticity and it will break. So about 10-20 hours after the racquet stopped playing at optimal levels, most players will not make the change to fresh strings as they should, instead they play till the string breaks, all the while frustrated with how poorly they played this entire last week. Love this product, friends, customers, other players ask to have their tension checked. Works like a charm, it's my secret weapon! LOL ### ⭐ Garbage *by T***G on February 19, 2017* It simply doesn't work 9 out of 10 attempts. Either fails to start a measurement or comes back with bogus values. For a tool this pricey it is a complete disappointment. ### ⭐⭐⭐⭐⭐ INVALUABLE *by S***R on December 4, 2014* We have used this in our tennis shop for over 2 years now and find it's information and reliablility to be outstanding. The data is invaluable if you are trying to determine when your stringbed has diminished to the point of needing a new string job. All in our stringing team are MRT's and spend time educating our customers on the use of the ERT 300. Many of the professional players that come through the Phoenix area have their own ERT 300's to check their racquets and the new stringing jobs done by our stringers at TENNIS CABANA in Sun City, AZ. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sc/products/7923997-beers-ert-300-tennis-computer-black](https://www.desertcart.sc/products/7923997-beers-ert-300-tennis-computer-black) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-05-03*