Zero contact to prevent cross infection. Holds 1200 ml of disinfectant or soap liquid. Easy to refill with your favorite product. Infrared sensing when placing hand under sensor. UV disinfection: Double sterilization. Liquid outlet modes: spray, drip or foam. Dual power design: DC or battery. Batteries included, not DC adaptor. 25,000 times of battery use. Included: connecting drip tray, batteries, drip nozzle and wall hanging hardware. Spray and Foam nozzles can be purchased separately.