Product material: ABS+metal Power supply mode: USB cable charging Charging voltage: 3.7V Rated power: 2W Intensity gear: 3 gears Maintenance and cleaning: If the appearance of the product is dirty, clean it with a dry, damp cloth or paper towel. No detergent is needed, and no washing. Matters needing attention: 1. If not used for a long time, please fully charge it; 2. Please place this product out of reach of children; 3. Non-professionals should not disassemble the product body.