Usage Tips: [High Accuracy] This grip strength tester is equipped with a high-precision strain gauge sensor, which can accurately measure grip strength up to 396 pounds, with a resolution of 0.2 lbs / 0.1 kg. [Bright Screen Display & USB Charging] The upgraded bright screen allows clear visibility of readings in low-light environments. It can be recharged via USB cable. AAA batteries (not included) may also be used. [Easy To Use] The LCD screen displays all measured values on one screen, including code, age, gender, grip value in pounds or kilograms, and grip status. Maximum grip value and power level indicators (weak, normal, or strong) can be saved and recalled for comparison. [Automatic Storage] The device stores up to 19 user-defined data entries, which can be viewed at any time. After testing, it displays the change in grip strength compared to previous measurements. [Various Occasions] This digital hand dynamometer is suitable for sports training, fitness, home use, and clinical applications. Grip testing is relevant for activities such as rock climbing, wrestling, and gymnastics, and serves as an indicator of overall health. Power supply mode: USB charging / 2x AAA battery (not included) Color: black Material: plastic Package Contents: 1 x Electronic Grip Strength Tester (batteries not included) 1 x USB cable Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.