400M/1312FT Ultra-Wide Wireless Range: Includes two plug-in doorbell receivers; Does not interfere with other devices in your home or neighbors; So even if you are a few rooms away or in another location, you can rest assured that you will not miss any visitors. 52 Ringtones to Choose From: The doorbell receiver provides rich and clear sound; Five adjustable volume levels with a maximum volume of 115dB; Press the next or previous button to easily select from 52 songs. High-Performance Transmitters: Extremely low power consumption; The doorbell button of the doorbell set uses a CR2032 lithium battery, which provides a 3-year service life; IP55 dust and water resistance; Works at temperatures from -20°C to 60°C; even withstand the harshest weather conditions. EASY SETUP: The wireless doorbell kit can be easily installed by attaching the doorbell button to the wall, no wiring required; includes two screws, two wall plugs, a wrench and a piece of double-sided tape. 3 Simply plug the