Technical details Control Type: Button Materials Polyester Nylon Germanium Waterproof: Yes Number of vibration settings: 3 Proper Use: Calves Types of massage: Pressure massage Product color: Black Size (S/M/L): S Calf circumference: 31 - 35 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 Battery included: Yes Cables: USB Type-C Case: Yes Adaptor: Yes Safety warning Warnings Keep out of reach of children. Use according to the instructions in the instruction manual. Do not use on damaged skin or wounds.