SECRUI Wireless Doorbell, Door Bell Ringer Wireless 1000 Feet with 5 Volume Levels, Waterproof and dustproof, 32Chimes & LED Flash, for Home Classroom Office

[Easy to Install] This SECRUI wireless doorbell has been paired before it reaches you. It can be set up in under a minute by simply plugging the receiver into the socket, eliminating the need for wiring or electrician installation.
[Long Distance] This wireless remote-control doorbell with high-frequency electronic technology uses the FM signaling protocol, which provides robust anti-interference feature and one-to-one signal pairing. There’s no need to be concerned that the signal will not reach the door next to you. And in an obstacle-less environment, the detecting distance can reach up to 1000 feet.
[Wide Range of Chimes] The doorbell has been updated with 58 songs, including Merry Christmas ringtone, and 5 adjustable-volume levels. You can choose from options like two buttons and one receiver, one button and two receivers, two buttons and three receiver set, etc. as needed.