Wireless Outdoor Waterproof Doorbell Automatic Battery Free, Temperature, Humidity and Time Display, The Wireless Doorbell has 38 melodies and 4 volume levels. Ready to use: This doorbell waterproof wireless home phone is paired before delivery. No wiring or electrician installation is required during use, and installation can be completed in 1 minute: plug the receiver into the outlet and it's ready to use. Long Distance: This high-frequency electronic technology wireless remote control doorbell adopts FM signal mode, which has strong anti-interference ability and one-to-one signal matching. Don't worry about poor signal connection beside. And the detection range is up to 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 reminder