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Doorbell model: H10
Operating range: 200 meters in open area
Volume:4 levels (25-80dB)
Battery type: 12 V 23A alkaline battery (Included)
The receiver voltage: 110-220V
Receiver Plug Type: UK plug
Waterproof grade: IP44
The doorbell can use in office,home, hospital,factory,restaurant or any where you need it.
200 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.