Features: A convenient innovation and simple touse.Theres no need for batteries or electrical power as it is directly connected to the water tap and uses water pressure. Provides a deep cleaning of interdental areas and removal of plaque beneath gums and simultaneously performs a beneficial massage of the gums. Easy to install at sinks and in shower; Easy to use snap on/off in one second; Easy to adjust for pressure; Easy to carry on travel. It is quite and comfortable,water temperature can be directly adjust at the tap. Flush your teeth after meals and before sleeping, keep health for oral cavity.