This is a digital hand dynamometer. I think it's convenient because it can use both batteries and USB. Model number is EH108. I bought it out of curiosity, but I've only used it 2-3 times, so it's almost like new. The sticker on the digital display hasn't been peeled off. The instructions are in English, but it's easy to operate. Just press start and squeeze. There are age settings, but I used it as is, so please understand. By the way, please note that the batteries in the photo are not included. I confirmed its operation as shown in the photo. If you need a hand dynamometer, please purchase it.