General description The Wireless Doorbell features a 400M/1312FT ultra-wide wireless range, ensuring you won't miss any visitors even if you're in another room. It includes two plug-in doorbell receivers that won't interfere with other devices in your home or your neighbors. Technical specifications Wireless range: 400M/1312FT Volume levels: 5 adjustable levels, maximum volume of 115dB Ringtones: 60 selectable ringtones Battery: CR2032 lithium battery with a lifespan of 3 years Operating temperature: -20°C to 60°C Water resistance: IP55 Power consumption: Extremely low Installation Easy setup with no wiring required Includes two screws and a piece of double-sided tape for installation Simply plug the plug-in receiver into a power outlet Usage Press the next or previous button to easily select from 60 ringtones The doorbell radio remembers the last selected melody and assigned volume even after a power outage No need to restore previous settings after a power outage