Product Name: Stepless Speed Regulation Nail Polisher Model: PFS-111 Charger: USB interface, 5V 1000mA (optional) Charging cable: micro USB charging cable Rechargeable battery: 3.7V 2000Ma Battery type: 18650 lithium battery Battery charging time: about 3.5 hours Autonomy on a single charge: approximately 20 hours Speed: 6300-820010%RPM adjustable Maximum torque: more than 230G Color box size 180*80*41mm Features: 1. Suitable for a variety of pets (equipped with a safety cover, choose the appropriate nail polisher according to the pet's size) 2. Replaceable professional grinding wheel (thick, removable for cleaning, replaceable) 3. Low noise design (controls noise below 45 decibels) 4. Ergonomic design, silicone shock absorption, good hand feeling (no finger pain when used for a long time). 5. Infinitely variable speed regulation (carefully polished animal nails) 6. USB charging, fully charged in 3 hours (DC 5V 1000mA) 7. Long using time after fully charged (about 20 hours working time)