Long Battery Life & Auto-timer Protect: The powerful battery can be used continuously for 21 days just fully charged in 4 hours. The water follosing pick will be stop running automatically after two minutes of work to ensures your safety and water dental flosser's lifespan. 300ML Detachable Water Tank & IPx7 Waterproof: 300ml water capacity perfect for enough and uninterrupted oral dental flossing. Detachable design allows you to thoroughly clean the limescale inside the tank. Plus the IPX7 waterproof and can be used in the shower. 360° Rotatable & Replacement Water Jet Tip: Water teeth flosser offer 5 replacement nozzles(2 Standard Jet Tips, 1 Orthodontic Tip, 1 Plaque Brush Tip, 1 Tongue Cleaner Tip) for your whole family. The 360° rotatable nozzle design help you easily access to all areas of the mouth. 3 Cleaning Modes with Memory Function: The cordless oral teeth cleaner has Normal, Soft, Pulse modes to meet various oral needs. Soft mode is recommended for first-time user and sensitive teeth. The memory function helps to remain the working mode for next use. Professional Improve Dental Health and Teeth Clean: Adopt advanced water flossing technology, 30-100psi, 1400-1800 times/min water pulsation, this powerful cordless oral irigator can remove food residue every corner effectively that regular toothbrush can not reach. It’s perfect for anyone with braces, crowns, or periodontal pockets.