Technical details Waterproof: Yes Size (S/M/L): M Types of massage: Pressure massage Proper Use: Calves Calf circumference: 33 - 37 cm Number of vibration settings: 3 Materials Germanium Polyester Nylon Control Type: Button Machine washable: Yes Product color: Black 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 Battery included: Yes Cables: USB Type-C Case: Yes Adaptor: Yes Safety warning Warnings Do not use on damaged skin or wounds. Keep out of reach of children. Use according to the instructions in the instruction manual.