1.Counting grip strengther: the hand grip strengthener has a counting function up to 9999, which allows you to record the number of your exercises every time you use the hand strengther. Simply press firmly on the button to automatically count. Gently press the bottom button to clear the numbers of the unit. 2.Ergonomic design for all hands: the ergonomic and soft trainer training set is suitable for small and large hands, seniors and teenagers, ensuring a comfortable hold. 3.Versatile for personal use: The Grip Strength Trainer can help improve grip strength, finger flexibility, wrist stability or overall forearm strength, making it a good choice for athletes, piano or guitar players, drummers and musicians, bodybuilders and more. 4. construction: the grip strength trainer is made of highquality material with a stainless steel spring for longlasting durability. The hand exerciser grip booster features soft, nonslip rubber grips. The hand trainer handle makes your workout more comfortable and r.