Specification: Item Type: Electric Nail Drill Machine Material: ABS Battery Type: Lithium Battery (Included) Battery Capacity: 2600mAh Speed: 0-30000 RPM How to Use: 1. Insert the plug of the grinder handle into the corresponding connection on the host machine. 2. Press and hold the button, the host digital tube and power will light up, and the host will work normally. 3. The digital tube displays F15 font, indicating that the grinding handle is in a positive rotation position, and the speed is 1500 rpm. Turn the clockwise knob, the digital tube number gradually increases with the rotation, and the handle speed also accelerates. Conversely, turning counterclockwise, the number of digital tubes decreases, and the speed of the handle motor also gradually decreases. 4. Short press the button switch, the digital tube display changes from F15 to R15, and the machine converts from forward to reverse, with a speed of 1500 RPM. 5. When not in use, simply press and hold the button, the digital display and power display will turn off, indicating that the machine is in sleep mode. 6. Power display: a full grid indicates sufficient battery capacity, and the working time will gradually decrease. When the display only shows one grid, charging is required. Connect the charger plug to the corresponding socket on the host, and the display indicator will flash, indicating that charging is working normally. Package List: 1 x Host 1 x Polishing Pen 6 x Polishing Heads 6 x Sanding Rings 1 x Storage Box 1 x Pen Holder 1 x Manual 1 x USB Cable 1 x Base