Description:
◆Audio:38 sources to choose from,through an external touch button operation. Sources including Asia, Europe,
America and the Middle East world-known music.
◆Volume control: high, medium, and low volume options, through an external switch (or key) operation.
◆LED indication:LED will be on after after AC receiver power on,LED also flashes regularly with the music
after the door bell rang;after AC doorbell powered LED is not lit, to achieve energy-saving purposes,
LED also flashes regularly with the music after door bell rang.
◆The four doorbell used battery for power,for shipping reasons,battery will not provided for samples