The button supports up to 20PCS, and the receiver supports up to 100pcs.
The transmitter without screw chuck design to achieve waterproof and dustproof.
Eye-catching backlight flashes when someone pushes the doorbell. Particularly suitable for the elderly, deaf, and pregnant women.
Uses machine-learning to prevent interference from other transmitters.
The transmitter USE a 23A12V alkaline battery (not include battery).
The receiver is available in a variety of plugs, US/EU/UK Plug and AU adapters, suitable for most countries.
Receiving distance:300 meters in area
The signal will be affected by obstacles. The more obstacles, the more serious the signal loss.
Receiver has 4 levels(can be mute) 0-80db,38 music to choose from.
Size:Transmitter:77x46x20mm,Receiver:90x56x20mm
NOTE:The button cannot be placed on an iron door because it will interfere with the signal.
the receiver into the socket ， Press the button on the exterior wall to remind.