SECRUI Wireless Doorbell, Easy installation, Waterproof, Adjustable Volume, 58 Chimes, Colorful LED, 1000Ft Range, M520+F55, Black

[Work Out of Box] This wireless doorbells for home has been paired before delivery. There is no need for wiring or electrician installation when using it since its installation can be completed within 1 minutes: plug the receiver into the socket, ready to go.
[Long Range] This high-frequency electronic technology wireless remote control doorbell adopts the FM signal scheme, which has strong anti-interference features and one-to-one signal pairing. No need to worry about signal connecting wrongly with the next door. And the sensing distance can reach up to 1000Ft in obstacle-free environment.
[Lead A Convenient Life]The doorbell has been updated with 58 songs (including merry christmas ringtone) and 5 levels of volume that can be adjusted. You can be add as required, choose 2 button with 1 receiver or 1 button with 2 receivers or 2 buttons with 3 receiver sets, etc.