General description Self-powered wireless doorbell: no battery, no wiring; easy to install and very eco-friendly. This device features a simple and compact design, making it suitable for the elderly and children. It can also function as a beeper (sound signal). Technical specifications Maximum range: 200 meters in an open area 38 different chimes 3 adjustable volume levels Installation Use the included tape or screws to secure the transmitter to the door frame Plug the doorbell receiver into a socket to start Usage The effective distance at 3 volume levels allows you to hear the ringtone and answer the door in time. Other information Box contents: 1 x transmitter, 1 x receiver