A smart and convenient wireless doorbell combo for your home,you can set different ring tone for different transmitter or receiver so you can know at which door you have a visitor. Wireless operating range up to 1000 ft(1000 ft in open area) for a big house,office,hotel service and other areas that is suitable for short-distance wireless environments. Easy Installation:just plug receiver into an electrical outlet and put the double-sided adhesive tapes at the back of the button, you can also use the screw to fix it. No extra work needed. Specification:
Voltage of Plug-In Smart Receiver: AC 110V ~ AC 220V 50Hz/60Hz
Battery in Transmitter: 12V 23A Alkaline Battery
Power Consumption (Transmitter): < 10mW
Wireless Range: 900 ft in Open Air; 100~500 ft with doors and walls
Ring Tone: 52 Options
Volume Range: 4 Levels (25~110dB)
Expandable to Multiple Smart Receiver or Transmitter: Up to 50
Working Frequency: 433.92 MHz±280KHz
Working Temperature: -30~70
2 x Plugin receivers
3 x Push buttons
3 x Adhesive tapes
1 x User manual12 months worry-free warranty.
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