Features 1. High-frequency over1500 water pulse effectively removes plaque and deeply cleans the teeth and mouth. 2. 3 modes (weak,strong, and pulse) offers varing oral care needs. 3. Charging time: ≤6hours ,after full charged can use for 30 times (twice of 2 mins a day 4.The USB interface charging design is easy to take anywhere. 5.Charging indicator with power shortage remider and power -off protection. 6.Memory function 7.Replaceable nozzle and nozzle can be 360° rotating to clean deeper. Specification Material ABS, POM,PC Waterproof IPX 7 Battery type DC3.7V,1500mAh lithium battery Power source DC 5V USB charging Product size 73X83X226mm Weight 300g Water pressure range 80-160PSI Water tank capacity 200ml