specification: _x000D_Item Type: Electric Foot File_x000D_Rated Voltage: 3.7V_x000D_Rated Power: 7W_x000D_Charging Voltage: 5.0V_x000D_Charging Current: 1A_x000D_Use Time: 50min_x000D_Battery Capacity: 1200mAh_x000D_Optional Color: Gold, Silver_x000D_Material: ABS + Quartz_x000D_Operating:_x000D_1. Press grinding head and pull it out to replace grinding head_x000D_2. Rotate gold/silver part clockwise(dust storage bin), to clean the inner sponge. After inner sponge is cleaned, lock gold/silver part counterclockwise(dust storage bin), and cleaning is complete. Features: 1360 not run off dandruff, all dandruff is absorbed, clean and hygienic. 2Arc grinding head can touch 98% of area of foot, and completely clean. 3Safety protection device, lightly press machine when in use, in order to avoid excessive force, machine will automatically stop when applied excessive force. 4Grinding head can be detached and washed, easy to operate and durable. 5Suitable for removing calluses, dead skin and other dirty substances on feet, making your foot skin soft and smooth. PackageList: 1 x Foot Sharpener3 x Grinding Heads (1 is installed on the machine by default)1 x Cleaning Brush1 x Manual1 x USB Cable