Krowne Royal Series Electronic Faucet, wall mount, single hole, infrared sensor, battery powered (4 AA alkaline 1.5V batteries) or power supply (AC adapter not included), low battery indicator light, 30 second time out & 1 second closing delay, includes mixing valve, internal check valves to prevent backflow & cross contamination, brushed nickel finish, fits all Krowne hand sinks, NSF, cCSAus, ADA Compliant