[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.