Automatic Waterproof Outdoor Wireless Doorbell, No Batteries Required, Temperature, Humidity and Time Display, with 38 Melodies and 4 Volume Levels 【Ready to Use】: This waterproof wireless doorbell for home is paired before delivery. No wiring or electrical installation is required during use, and the installation can be completed in 1 minute - just plug the receiver into the socket and you're done. Usage. 【Long Distance】: This high-frequency electronic technology of the wireless remote doorbell adopts FM signal scheme, which has strong anti-interference ability and one-to-one signal adaptation. There is no need to worry about poor signal connection on both sides. And the detection distance can reach 600 feet in a barrier-free environment. 【Temperature and Humidity HD Display【Temperature and Humidity Sensor】The wireless doorbell is equipped with a temperature and humidity sensor, which can detect the temperature and humidity changes. of the indoor environment in real time, allowing