400M / 1,312FT Ultra-Wide Wireless Range: Includes two plug-in ringer receivers; does not interfere with other devices in your home or at your neighbors; even if you're a few rooms away or in another location, you can rest assured that you won't miss any visitors. 52 Ringtones to Choose From: The ringtone receiver provides rich, clear sound; five adjustable volume levels with a maximum volume of 115 dB; press the next or previous button to easily select from 52 melodies. High-Performance Transmitters: extremely low power consumption; the bell button of the doorbell set uses a CR2032 lithium battery, which provides up to 3-year life; IP55 dust and water resistance; operates at temperatures from -20C to 60C; withstands harsh 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 anchors, a key, and a piece of double-sided tape. Simply plug the receiver into the socket. Memory Function: the doorbell radio remembers your last selected melody and assigned volume even after a power outage; no need to reset previous settings; convenient and user-friendly design enhances your experience. When shopping, please check the product dimensions to ensure it meets your needs. Detailed information about the product, including features and specifications, is provided in the title and description.