1. Versatile Use for Multiple Users: This digital hand dynamometer is designed for use by multiple people, offering adjustable resistance to accommodate various strength levels. Its ability to record and count grip force makes it ideal for rehabilitation and strength training for all users. 2. Dual Power Options for Convenience: Equipped with both AAA battery and USB charging capabilities, this hand grip strength trainer offers flexible power solutions. The built-in lithium battery ensures you always have the power you need, making it convenient for use anywhere.(Not included batteries) 3. Adjustable Grip Distance: Featuring an adjustable handle, this grip strengthener provides a comfortable grip for different hand sizes. The customizable grip distance enhances user experience, making it suitable for a wide range of individuals, from beginners to advanced users. 4. Clear LCD Display: The hand grip strength tester's large, high-definition LCD screen clearly displays grip strength measurements, making it easy to read for everyone, including seniors. This ensures accurate monitoring of progress and performance, enhancing your training or rehabilitation routine. 5. Robust Construction for Varied Needs: Designed to withstand a variety of grip strengths, this hand exerciser meter meets the needs of different users. From athletes to those in rehabilitation, it provides reliable performance, ensuring effective strength assessment and training. Power Supply:2xAAA batteries(Not included batteries) Colour:Black Material:ABS Package Contents: 1 * grip strength trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.