This product is an automatic infrared sensor that detects a range of within 3.9 inches (10 cm) and automatically sprays disinfectant liquid. Effectively prevents colds and bacteria from being infected with dirty hands, so it is hygienic and avoids the risk of cross-contamination.Disinfects your hands without direct contact with the sterilizer, so it can effectively prevent cross-infections.Suitable for hospitals, pharmacies, medical institutions, offices, hotels, schools and other public places.The included bottle holds 1000ml of sanitizer.1ml spray every time for about 1000 uses.Powered by 4 AA batteries (not included).Low energy consumption circuit design extends battery life and saves money