Powerful, Safe & 2 Speeds Adjustable: Electric Pedicure Tools has 2 speeds:1700 RPM/min and 2000 RPM/min.When the pressure of the pedicure tool is too high,its will automatically stop working and protect your skin. Long Lasting & Battery Display: High quality 1200mAh large capacity lithium battery has overcharge protection function and 5 levels battery display function. It can help you know how much rest of power of the battery and when should be charged.USB charging time is usually 4-5 hours,it can work about 120 minutes continuously. IPX7 Waterproof: The electric foot file has waterproof design, whole body can be rinsed under running water. You can use it to make a perfect foot care for your feet when you get out of the shower. It is recommended to dry your feet before use, and then use it for better results. Note: Do not soak it in water for a long time. 3 Replacement Roller Heads: electric callus remover has 3 different quartz sand roller heads. Rough roller head for remover stubborn horny dead skin, medium roller head for remover rough dead skin and fine roller for daily foot care. You can choose suitable roller head according yourself skin to foot care, make your feet skin restore the delicate and smooth. Specification: Battery capacity:1200 mAh Power: 5W Voltage: 5V-1A(USB) Capacity: 3W Charge time: 4 hours(not more than 12 hours) Use time: about 120 minutes Size: 16.5 x 6.5 x 3.5cm Pack list: 1 x electric foot file 3 x Replacement Heads 1 x Cleaning brush 1 x USB Cable 1 x Cleaning Brush