This is a digital hand grip dynamometer. Operation has been confirmed. Although it's not the original case, I will also include a case made of shock-absorbing cushion material. I've only used it 2-3 times, so it's in beautiful condition with no dirt or scratches. However, I disinfected it thoroughly after use, and the serial number sticker came off during that process. Please purchase only if you understand this. Measurement: Made in Japan, same as T2177, TKK5401 Size: Approximately W154 x D235 x H62mm, grip width 40-70mm, grip width 100mm Weight: Approximately 0.68kg Measurement range: 5.0-100.0kg Display: 4-digit LCD, 0.1kg increments Auto power-off function: Approximately 1 minute after the last measurement Power supply: 2 AAA batteries Continuous operating time: Approximately 100 hours