Vender Wireless Doorbell Kit Without Battery, 1 Self-Powered Button al mejor precio

Description: 38 musics to choice, 4 gears voice volume adjustment The audio of the chime is very loud, but it can be adjusted according to user's preference It uses unique energy harvesting technology and ultra-low-power wireless technology with worldwide patents pending ， When users press the button, energy converting module inside will change the mechanical energy into electric energy. Then the wireless module of the button sends the signals to receiver. The receiver receives the signals and plays music/react. No battery need and no wire ，The product is easy to install Furthermore, the 120 Metres operating range is already adequate. The doorbell can use in office,home, ,factory,restaurant or any where you need it. Specification: Transmitter size: 86x88x9.9mm Receiver size: 33x33x45mm Waterproof: IP44 Volume: 4 files(can be mute) Ringtones: 38 tones Receiving distance:120M(in open area) Receivers Rated voltage : AC 110V-220V Package Includes: 3 x receiver 1xtransmitter 1 x user manual 1 x adhesive tape 1 x bell paster 1 x bag of screws