Ready to use: This waterproof wireless home doorbell 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 is ready to use. Long distance : This high-frequency electronic technology wireless remote control doorbell adopts FM signal scheme, which has strong anti-interference ability and one-to-one signal matching. No need to worry about poor connection with the signal next door. And the detection distance can reach 600 feet in an obstacle-free environment. HD Screen for Temperature, Humidity and TimeThe wireless doorbell is equipped with a temperature and humidity sensor. humidity, which can know the change of indoor environment temperature and humidity in real time, so that you can enjoy a healthy life. The time reminder function ensures that you never miss any important moments.