RF 433MHz Wireless Doorbell Home Smart Door Bell 150M Long Distance 38 Songs Ringtone Chime Calls with Battery for Home Store

Specification:

(1) Working frequency: 433MHz
(2) Music quantity: 38
(3) Output method: Horn
(4) Demodulation method: ASK
(5) Encoding format: EV1527
(6) Shell material: ABS
(7) Control method: Equipped with a remote control for control

Features:

4 levels volume adjustable, 38 ringtones.
strong signal, 150m long distance transmission.
large button, easier to press.
push the button, immediate response, and change colors.
plug-in installaion, easy to use.
emergy saving button, long-term standby
combination, free matching