Feature:1. Adjustable Resistance: Hand grip strengthener has 5100KG/11.0220.5lb strength, flexible to adjust the strength required for training, to meet the different people of the whole family exercise.2. Automatic Counting: Grip strength trainer has automatic counting, the number of times at a glance, the number of displays can be cleared, repeated use.3. Thickened Spring: Hand grip strengthener's high strength thickened spring is made of stainless steel, wear resistance and rustproof, no breakage and long service life.4. Ergonomic Design: The handle of the hand grip strength trainer is ergonomically designed with a comfortable non slip grip that fits every finger.5. Widely Applicable: The grip strength trainer can be used in fitness machines, rehab exercise machines, five finger grip strength trainers, etc., making the hand grip stronger.Specification:Item Type: Hand Grip StrengthenerMaterial: PP, SteelBattery Information: Lithium Battery 170mAh (Shipped with Built in Battery).Package List:1 x Hand Grip Strengthener