Product description Package List: 1 x Nail Polisher 1 x Sanding Pen 6 x Grinding Heads 1 x Grinding Head Storage Box 6 x Sand Ring 1 x USB Charging Cable 1 x Pen Holder 1 x Manual How to Use: 1. Knob switch, the protective opening machine starts, and the digital display shows the corresponding speed 2. Switch forward and reverse through the side buttons 3. Metal precise handle, replaceable grinding head 4. When the power indicator flashes, please charge in time 5. Unplug the power when the indicator light stops flashing Specification: Item Type: Nail Drill Machine Material: ABS Battery type: Lithium ion battery (shipped with built in battery) Battery capacity: 4000mAh Adjustable speed: 0-35000rpm Ingredients default