Wireless doorbell outdoor waterproof and automatic without batteries, temperature, humidity and time display, wireless doorbell with 38 melodies and 4 volume levels Ready to work : This waterproof wireless doorbell for home is paired before delivery. No wiring or electrician installation is required during use, and installation can be done 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 pattern, which has strong anti-interference ability and one-to-one signal matching. No need to worry about bad connection with the signal beside. And the detection distance is up to 600 feet in an unobstructed environment. HD display for temperature, humidity and timeThe wireless doorbell is equipped with a temperature sensor and a humidity, which can know the indoor environment temperature and humidity change in real time, so that you can enjoy a healthy life. The time reminder function allows you never to miss any important moment again. Weatherproof and Energy Resistant: The wireless battery 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 0dB to 100dB.We have advanced automation equipment, high precision placement. We strictly control product quality. If something is wrong, please contact us as soon as possible to find a solution.