This kind of Automatic Sensor Faucet is made of high quality material with advanced technology. It uses the principle of infrared reflection. When the hand is placed in the sensing area of the faucet, the infrared light emitted by the infrared emitting tube is reflected by the human hand to the infrared receiving tube, and the processed signal is sent to the pulse solenoid valve to control the water outlet system. So you do not need to touch faucet, just let your hands under the water outlet, the water will get out, when you leave, it will be close. No touch, no virus. Now corona virus are spreading to all the world, the application of the Automatic Sensor Faucet can reduce touch to some extent, thereby keeping yourself and your family safe. It is very popular with our customers all over the world due to delicate design and advanced technology.