General description The Wireless Doorbell Set offers a reliable and convenient solution for your home, featuring a 400m (1312ft) ultra-wide wireless range. With three plug-in receivers, you can ensure that you never miss a visitor, even if you're in another room or outside. The doorbell is designed to operate without interference from 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 melodies to choose from Battery: CR2032 lithium battery with a lifespan of 3 years Operating temperature: -20°C to 60°C Water resistance: IP55 Installation Easy setup by plugging the doorbell button into the wall, no wiring required Includes two screws and a piece of double-sided tape for mounting Simply plug the plug-in receivers into power outlets Usage Press the next or previous button to easily select from 60 ringtones The doorbell remembers the last selected melody and volume