Smart Wireless Doorbell Door Chime Kit No Socket Required 300M/984 FT Remote 38 Songs Melodies Sound Home Door Bell Battery Type

A Wireless Doorbell That Doesn't Need To Be Plugged In And Can Be Put Wherever You Want Features: 1) The battery life of the button is up to 1 years (calculated 10 times a day). 2) Long-distance open and barrier-free 300 meters/984FT has strong penetration performance, and indoor obstacles are about 20~60 meters. (Note: The actual received signal varies depending on the environment, and the signals are different due to obstacles the data comes from the factory laboratory) 3) Equipped with 60 pieces of music, 5 levels of volume, and the receiver has up and down song selection keys, making the operation more convenient! 4) The host has a large metal speaker, which sounds pleasant to the ear! The volume is about 85-97dB, 5) Application occasions: Used as a wireless doorbell or call reminder in homes, villas, schools, companies, hospitals and other places. 6) Supports the use of multiple sets of doorbells, Press any button, the receiver ringtone will sound, and each button can be set with a different ringtone to distinguish visitors. Working Principle： The transmitter is installed outside the door, and the receiver uses 3*AAA batteries（Not included）/Micro USB power cord （Not included）to power the power supply. Press the transmitter to ring the bell, and the receiver immediately rings the bell and flashes a light to remind. Free Matching Mode Of Transmitter And Receiver: Long press the volume button of the receiver for 4 seconds, the receiver lights up and enters the learning state; then press the transmitter. if the receiver flash and ring. that means pair successfully