[Smart Counting Grip Strengthener] Add counting function, our hand strengthener could record your exerciser number every time when you use it. So you can know better your training progress and training results with counting number. Just Press the button firmly to count automatically. Gently rotate button to clear units digital, push and rotate button to clear tens digitals.[Easy-Adjustable Resistance]Easy to adjust the resistance from 10-130lbs as needs. The hand Gripper is suitable for everyone, like Athletes, sports, fitness coaches, fitness, musicians and people who want to exercise their hand, wrist and fingers.[Injury Rehabilitation &Exercise Equipment]Perfect for improving power and flexibility of forearm, wrists, fingers, hand ,and muscle building. Excellent for recovery of hand injury, rheumatoid arthritis, arthritis, carpal tunnel, tendovaginitis, fractured, broken wrist, and tendon surgery.[Smart Counting Grip Strengthener] Add counting function, our hand strengthener could record your exerciser number every time when you use it. So you can know better your training progress and training results with counting number. Just Press the button firmly to count automatically. Gently rotate button to clear units digital, push and rotate button to clear tens digitals.[Easy-Adjustable Resistance]Easy to adjust the resistance from 10-130lbs as needs. The hand Gripper is suitable for everyone, like Athletes, sports, fitness coaches, fitness, musicians and people who want to exercise their hand, wrist and fingers.[Injury Rehabilitation &Exercise Equipment]Perfect for improving power and flexibility of forearm, wrists, fingers, hand ,and muscle building. Excellent for recovery of hand injury, rheumatoid arthritis, arthritis, carpal tunnel, tendovaginitis, fractured, broken wrist, and tendon surgery.Colour:blackMaterial:spring steelSize:15 x 9.5CMPackage Contents:1 * Grip strength deviceOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.