400 m/1312 ft Ultra-Wide Wireless Range: Includes two plug-in doorbell receivers; It won't interfere with other devices in your home or your neighbors; so even if you're a few rooms away or in a different location, you can be sure you won't miss a visitor. 52 Ringtones to Choose From: The bell receiver offers rich and clear sound; Five adjustable volume levels with a maximum volume of 115 dB; Press the next or previous button to easily select from 52 songs. High-Power Transmitter: Extremely low power consumption; The doorbell set's doorbell button uses a CR2032 lithium battery with a 3-year lifespan; IP55 dust and waterproof; Works in temperatures from -20 °C to 60 °C; Withstands even the most adverse weather conditions. EASY INSTALLATION: The wireless doorbell set is easy to install by attaching the bell button to the wall, completely without cables; includes two screws, two anchors, a wrench, and a piece of double-sided tape. 3 Simply plug the plug-in receiver into the power outlet.