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Working range:300M(open area)
Transmitter power:12V23A alkaline battery(not included)
Receiver plug type: US/EU/UK plug AU adapter
Waterproof rated:IP 44
The doorbell can use in office,home, hospital,factory,restaurant or any where you need it.
300 meter receiving distance (In the open area),Stable quality is ideal for villas, hotels, schools and other areas.
The button cannot be placed on an iron door because it will interfere with the signal.
Just plug the receiver into an electrical outlet,the push button transmitter can be stick it to the door with provided adhesive tapes.
Wireless Doorbell AC 100-240V 300M Receiving Range 3 Volume 36 Chimes Door Ring IP44 Waterproof EU UK US Plug Receiver