Technical details Proper Use: Hands Number of vibration settings: 3 Materials Polyester Germanium Nylon Bicep circumference: 31 - 42 cm Product color: Black Waterproof: Yes Machine washable: Yes Control Type: Button Size (S/M/L): L Types of massage: Pressure massage Power Power supply type: Battery Replaceable battery: Yes Working time: 45 min Weight and dimensions Battery dimensions: 47 x 52 x 11 mm Packaging data Number of pieces: 1 Package contents Cables: USB Type-C Battery included: Yes Case: Yes Adaptor: 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.