Three-To-Two Home Smart Long-Distance Wireless Waterproof Doorbell

Plug: Chinese standard, American/Japanese standard, European standard, British standard

Specifications: Three for two (3 transmitters + 2 receivers)

Waterproof grade: transmitter waterproof grade IP44

Working temperature: -30��C to +70��C

Working frequency: 433.92MHz��75KHz

Receiver voltage: 100-260V/50-60Hz (wide voltage)

Transmitter battery: 12V23A mercury-free environmental protection battery (with certification)

Product certification: FCC, CE, ROSH, appearance patent, etc.

Ringtone: 36 optional, learning code, DIY

Volume: 0-100 decibels, 4 levels adjustable