Technical details Control Type: Button Types of massage: Pressure massage Waterproof: Yes Materials Polyester Nylon Germanium Product color: Black Number of vibration settings: 3 Proper Use: Hands Size (S/M/L): M Bicep circumference: 27 - 34 cm Machine washable: Yes Power Working time: 45 min Power supply type: Battery Replaceable battery: Yes Weight and dimensions Battery dimensions: 47 x 52 x 11 mm Packaging data Number of pieces: 1 Package contents Cables: USB Type-C Adaptor: Yes Case: Yes Battery included: Yes Safety warning Warnings Use according to the instructions in the instruction manual. Keep out of reach of children. Do not use on damaged skin or wounds.