Wireless doorbell outdoor waterproof automatic battery-free, temperature, humidity and time display, the wireless doorbell has 38 melodies and 4 volume levels. Ready to use: This waterproof wireless home doorbell is paired before delivery. No wiring or electrician installation is required during use, and the installation can be completed in 1 minute: plug the receiver into the socket and it is ready to use. Long distance: This wireless remote control doorbell with high-frequency electronic technology adopts the FM signal mode, which has strong anti-interference ability and one-to-one signal matching. Don't worry about poor signal connection next door. And the detection range can reach 600 feet in an open environment. High-definition temperature and humidity time display: The wireless doorbell is equipped with a temperature and humidity sensor, which can understand the temperature and humidity changes in the indoor environment in real time, allowing you to enjoy a healthy life. Time