1. Power lithium battery---Higher water pressure than other handheld models in China
2. 300ml water tank---Enough for one-time use for most people. 3. Higher capacity lithium battery---2500mAh 4. Low frequency with higher water volume---Not harmful or breeding to teeth gum after adaptive phase 5. Five pressure modes---More choices for personal use. 6. IPX7 waterproof ---Water pump/Motor and Circuit Board/Battery are in separate room 7. Six nozzles for option.