2 functions: This basin mixer has 2 valves, a solenoid valve and a ceramic core. You can manually switch off the infrared sensor and turn the tap on and off with the twist handle, for example when you are travelling or have no batteries on hand to replace. G1/2 connection size, complete accessories, ready to install, faucet accessories are complete, you can install when you receive the goods, convenient and fast, enjoy the new experience of home decoration With AA batteries (batteries not included), the water is automatically supplied once the hand is within the sensing range and stops when you leave your hands When a hand approaches the sensor window, the water comes out instantly, stops when the hand leaves, reaches out to the side and turns off the second time (water storage function: 3 minutes automatic shut-off) 2 sensor tap: Unlike classic automatic taps equipped with only one infrared sensor, this mixer tap has an additional infrared sensor on the side. The water comes out for a maximum of 3 minutes.