How to Use: 1. Remove the dust cover on the foot grinder 2. Long press the bottom button to power on, short press to adjust the gear, long press the button 3. Put your hand into the card slot to buckle the sanding head, and the sanding head can be separated from the fuselage by pushing the sanding head outward Specification: Item Type: Electric Foot Grinder Product Material: EVA, Quartz Sand Product Size: Approx. 5.8 x 6.6 x 9.6cm / 2.3 x 2.6 x 3.8in Gears: 2 Levels, 1 Level 2000 Rpm, 2 Levels 2500 Rpm Built in Battery Specification: Li Ion Battery, 1200mAh Package List: 1 x Electric Foot Grinder 1 x Dustproof Cover 1 x Replacement Grinding Head 1 x Brush 1 x Charging Cable Note: Shipped with Built in Battery