400M / 1312FT Ultra-Wide Wireless Range: Includes two plug-in chime receivers; does not interfere with other appliances in your home or neighbors. Even if you're in another room or location, you can rest assured you won't miss a visitor. 52 Chimes to Choose From: Chime receiver provides rich sound and light effects; five adjustable volume levels with a maximum volume of 115 dB; easily select from 52 melodies using the next or previous button. High-Performance Transmitter: Features extremely low power consumption; the chime button set uses a CR2032 lithium battery, providing up to 3 years of battery life; IP55 rated for dust and water resistance; operates in temperatures ranging from -20C to 60C, suitable for extreme weather conditions. Easy Setup: Wireless doorbell kit is simple to installjust mount the doorbell button on the wall with no wiring required. Includes two screws, two anchors, a key, and a piece of double-sided tape. Simply plug the receiver into a standard outlet. Memory Function: The doorbell retains your last selected melody and volume level even after a power outage; no need to reset settings. User-friendly design enhances overall experience.