①. The faucet with infrared sensor allows you to wash your hands without touching it, avoiding cross-contamination by bacteria and ensuring hygiene. ②. When the handle is open you can open and close the faucet at will without touching the bathroom faucet body completing your water operation and simplifying use. ③. The infrared sensor automatically controls the faucet - simply place your hand under the faucet and the water will flow in seconds. The faucet can be closed without touching the handle after washing your hands. Comfortably clean. ④. Standard 1/2" connections. All common hot and cold water connection systems can be connected to our sensor faucets. Even if you're not a plumber or handyman, installation is child's play for users of all levels. ⑤. Operates on AA batteries (batteries not included) can be used without a socket at sink level or in the event of a power failure, but requires maintenance and replacement when batteries run out