Product Description Wireless doorbell is an ideal unit for easily installing a doorbell without the hassle of wiring. Simply plug the receiver to an AC outlet and mount the transmitter where?needed and you are ready to go! The doorbell features 52 ring tones and four levels of volume to suit your needs and can reach a distance of up to 300m when there are no?obstructions. Specification: Voltage of Plug-In Smart Receiver: AC 110V ~ AC 220V 50Hz/60Hz Battery in Transmitter: 12V 23A Alkaline Battery Power Consumption (Transmitter): Wireless Range: 900 ft in Open Air; 100~500 ft w/ Metal Security doors and Walls Selectable Ring Tone: 52 Options Volume Range: 4 Levels (up to 110 dB) Expandable to Multiple Smart Receiver or Transmitter: Up to 50 Working Frequency: 433.92 MHz±280KHz Working Temperature: -30℃~70℃ Package Included: Doorbell x 1 Small battery (23A 1.2V) x 1 3M Sticker x 1 Anchors and Screws x 2 User Manual x 1
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