Safe Clean Convenient Suitable for hospital, kitchen, rest room, beauty parlor, barber shop, and toilet of restaurant, hotel, office, public area... Feature: Infrared detection, Motion Activated No more contact & infection Safety, Convenience, Cleanness Content 1300ml Easy battery replacement 4 purchase AA size Alkaline batteries No wiring Low consumption Liquid soap, shampoos and more Convenient for lotion refilling Do not install the dispenser above the mirror surface or above flowing water The sensor is at the base of dispenser. The effect range is from 0-10cm underneath the sensor.