1. This grip strength tester is equipped with a strain gauge sensor that can measure grip strength up to 396 pounds, with a division of 02 pounds / 01 kg. 2. The grip strength tester display function allows clear reading in the dark. It can be charged via a USB cable and also uses traditional AAA batteries (not included). 3. The liquid crystal display shows the grip strength meter, with all measured values on the same screen, including user code, age, gender, grip value in pounds or kilograms, and grip status. The maximum grip value display and weak, normal or strong level can be saved and recalled for comparison. 4. The hand grip strength device can store up to 19 user-defined data, which can be viewed at any time; after the test, it can show the increase or decrease in grip strength. 5. The digital hand dynamometer is suitable for sports training, sports, family and clinical use. Grip testing is essential for sports such as rock climbing, wrestling and gymnastics, and is also an indicator of overall health. 6. Power mode: USB charging/2xAAA battery (not included) 7. Color: black 8. Material: plastic 9. Package contents: 1 * Electronic handle (battery not included), 1 * USB cable 10. Only the above package contents, other products are not included. 11. Note: Due to light and screen differences, the item color may slightly vary from the picture. Manual measurement allows +/- 1-3cm error.