Self-powered wireless doorbell, no batteries required, effective range up to 200 meters, 38 ringtones, 3-level volume control, easy to install (black).

Self-contained wireless doorbell: no batteries or wiring required, easy installation. Extended range: up to 200 meters in open field. Three volume levels and optimal range ensure a quick response. Simple and compact design; can also be used as a doorbell, ideal for the elderly and children. This battery-free wireless doorbell offers 38 different ringtones and 3 volume levels to meet all your needs. Easy installation and use: two installation methods are possible. Attach the transmitter to the door frame using the included adhesive tape or screws. Then insert the receiver into the outlet to activate it.