1. This grip strength tester is equipped with a high-precision strain gauge sensor, which can measure grip strength up to 396 pounds, with a division of 0.2 lbs / 0.1 kg. 2. The grip strength tester has an upgraded bright screen function that allows clear viewing of readings in dark environments. It can be recharged via a USB cable and also works with traditional AAA batteries (not included). 3. The LCD screen of the grip strength meter clearly displays 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 and the weak, normal or strong power level can be saved and easily recalled for comparison. 4. The hand dynamometer grip strength device can store up to 19 user-definable data, and their records can be viewed at any time when needed; after the test, it can display the increase or decrease in grip strength compared to previous measurements. 5. The digital hand dynamometer is suitable for sports training, sports, family and clinical use. Grip testing is necessary for sports such as rock climbing and wrestling, and it is also an important indicator of overall health. 6. Power supply mode: USB charging/2xAAA battery (not included) 7. Colour: black 8. Material: plastic 9. Package Contents: 1 * Electronic Grip (battery not included), 1 * USB cable. Only the above package content is included; other products are not included. 10. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.