400?M 1?312?FT? UltraWide Wireless Range: Includes two plugin chime receivers?Do not interfere with other appliances in your home or neighbors;So, even if you're a few rooms away or in another location, you can rest assured that you won't miss a visitor.52 Chimes to Choose from: Chime Receiver provides rich sound and light; Five adjustable volume levels with a maximum volume of 115 dB;Easily choose from 52 songs with the press of the next or previous button. ?Highperformance transmitter? : Extremely low power consumption? ;The chime button chime set uses CR2032 lithium battery, providing 3 years of life;IP55 dust and water resistant; operates in temperatures ranging from 20C to 60C; withstands even the harshest weather conditions. ? easy setup? : The wireless doorbell kit is easy to install just by attaching the doorbell button to the wall, no wiring required? Includes two screws, two anchors, a key, and a piece of doublesided tape.3 Simply plug the plugin receiver into an outlet. Memory Function: The doorbell radio will remember your last selected melody and assigned volume even after a power outage? You don't need to reset previous settings? Convenient and userfriendly design enhances your user experience.