Product name: grip strength trainer Product size about :19.3*12.5cm/7.59*4.92in Product color: As shown in the figure Product material: Plastic product features: -Hand Dynamometers provide accurate, real-time readings from precision sensors and are ideal for monitoring the growth of your grip strength over time! -The device records grip strength measurements for up to 19 users, including age and gender. View the record at any time, automatically displaying the incremental change from the last test for easy comparison -This lightweight grip strength tester has an easy-to-read display; adjustable handle length for different hand sizes; and is more convenient and comfortable than older manual models that are often difficult to read and use -A must-have tool for sports such as climbing, wrestling, gymnastics, and for overall health assessment. This grip strength tester is versatile and suitable for sports training, home use and clinical settings -AFTER-SALES SUPPORT: If you have any questions or concerns about our products, please feel to contact us. We will be happy to serve you and ensure your satisfaction. Precautions: 1. As we know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Package Included: 1 pcs strength training grip strengtheners