characteristic:Fast electric callus remover: two speeds, fast and safer skin and troubles, painless and convenient.USB rechargeable foot file: Our pedicure file is battery-powered, with a built-in 500mAh large-capacity lithium battery. After 1.5 hours of fast charging, it will last about 50 minutes.Removable grinding head: The grinding head can be removed and rinsed immediately after use, effectively solving the problem of residual calluses and ensuring cleanliness.There are 3 interchangeable grinding heads: coarse, fine, and polished grinding heads, which can easily remove thick artifacts on the feet.Built-in dust collection system: It can pick up calluses while grinding, and the high-quality body is conducive to efficient heat dissipation, without worrying about overheating.Specification:Name: Wireless Portable Foot Grinding MachineModel: S161.Charging voltage: DC 5.0VCharging process: 2ANominal voltage: 3.7VRated power: 2.5WTime commitment: 50 minutesBattery capacity: 500mAhWeight: about 130gSize: about 10.5*6.6*5.4cm/4.13*2.60*2.13inLow speed speed: 1600 rpm / aboutHigh-end speed: 1700 rpm / approxpacking list:1*Wireless portable foot grinding machine (with grinding head)2*grinding headA notice:1. Reduce the lighting effect and shooting angle, the product has color difference, please understand.2. Due to manual measurement, there is an error in the product size.