Technical details Control Type: Button Product color: Black Proper Use: Hands Materials Polyester Germanium Nylon Waterproof: Yes Number of vibration settings: 3 Machine washable: Yes Types of massage: Pressure massage Size (S/M/L): S Bicep circumference: 23 - 30 cm Power Power supply type: Battery Working time: 45 min 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 Battery included: Yes Case: Yes Safety warning Warnings Keep out of reach of children. Do not use on damaged skin or wounds. Use according to the instructions in the instruction manual.