Convenient and Safe to recharge. 4 hours full charge can support 60 days long time use(Based on 2 mins/times in clean mode every day). Charger base is compatible with mobile phone adapter and any other USB port.3 Brushing Modes (Clean, Polish, White) to meet your brushing needs. It suits different conditions of teeth and gums. It helps the fresh user to adapt to using the electric toothbrush.Electric toothbrush equipped with 34,000 micro-brushes per minute powerful ultrasonic technology, efficient vibration produces a pulse force which drive fluid deep between your teeth and clean stubborn tooth stains deeply.This model has IPX7 rate water-resistant. The toothbrush can be rinsed with water so it can be used at bath and shower, safe and convenient.Please fully charge the toothbrush before using. Highly recommend to use the Clean mode for first using.60 days working, it's based on clean mode with 2 mins two times every day. Please put the toothbrush in your mouth before power on to avoid toothpaste splashing. Kids under 3 years old is not allowed to use this device. Please replace the brush head when the brush head is visibly scattered or over 3 months. If you did undergone surgery for your gum or oral within 2 months, please consult your dentist before use.