Ready to use: This waterproof wireless doorbell for home 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 for use ;use. Long distance: This high-frequency electronic technology wireless remote control doorbell adopts FM signal pattern, which has strong anti-interference ability and one-to-one signal matching. No need to worry about poor connection with 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 sensor temperature and humidity monitor, 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 makes you never miss any important moments. Weather resistance and energy: The wireless battery-free doorbell is made of high-quality ABS material, which has excellent flame retardant and flame retardant properties. Operating temperature: -4F -140F. IP45 dustproof and waterproof protection. The transmitter adopts high-end self-generation performance and does not need to install batteries. Exquisite appearance and high quality: The doorbell has updated 38 songs and 4 levels of adjustable volume. With 4 adjustable volume levels (with mute function) from 0 dB to 100 dB.