400 M / 1,312 FT Ultra-Wide Wireless Range: Includes two plug-in ring receivers; does not interfere with other devices in your home or your neighbors' homes; So even if you're a few rooms away or somewhere else, you can rest assured that you won't miss any visitors. 52 Ringtones to Choose From: The ringtone receiver offers rich sound 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-performance transmitters: extremely low power consumption; The ringer button of the ringer set uses a CR2032 lithium battery, which provides a 3-year lifespan; IP55 dust and water resistance; Operates in temperatures from -20C to 60C; even withstand the harshest weather conditions. EASY SETUP: The doorbell kit without ...