Micro-vibration brushing technology Perfect cleaning with a 360° rotating head 6 working modes: Cleaning 1 normal - 5 strong Working frequency: 22000 rotations/minute 2-minute timing reminder, 30-second zone reminder Waterproof grade: IP67 Battery: 600mAH lithium battery Charging method: USB-TYP-C Usage time: 3 hours full charge for 15 days of continuous use Working voltage: DC3.7V, 2W