Product Upgraded Cordless Nail Drill Design: This electric nail file doesn't need to be connected to a power cord during use, avoiding cable tangling issues, making it convenient for you to use the cordless nail file anytime, anywhere. At the same time, the noise level, temperature, and vibration of the nail file are very low during use, effectively improving your user experience. Easy-to-Use Adjustable Electric Nail File: Insert the file into the cordless nail file, long press the power button to turn on the electric nail file, then short press the power button to select the speed, and finally press the F or R button to adjust to the desired direction. Two Charging Methods - USB Charging, Wireless Charging: The cordless nail file has a wireless charging function, supports Type-C charging and docking charging. The nail file can be fully charged in just 2 hours, and the electric acrylic nail file can be used for about 6 hours.