Waterproof and Automatic Wireless Outdoor Doorbell, Battery-Free Wireless Outdoor Doorbell, Waterproof and Automatic, Battery-Free, Temperature, Humidity, and Time Display, Wireless Doorbell with 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 and installation can be done in 1 minute: plug the receiver into the outlet and it's ready to use. Long Range: This wireless remote control doorbell with high-frequency electronic technology uses FM signal patterns, which have strong anti-interference capabilities and one-to-one signal matching. You don't need to worry about poor signal connection nearby. And the detection distance is up to 600 feet in an open environment. HD Display for Temperature, Humidity, and Time: The wireless doorbell is equipped with a temperature sensor and a humidity sensor, which can detect changes in indoor temperature and humidity in real-time, allowing you to enjoy a healthy life. The time reminder function ensures you never miss an important moment. Weatherproof and Energy-Saving: The wireless battery doorbell is made of high-quality ABS material, which has excellent flame-retardant and fire-retardant properties. Operating temperature: -4F -140F. IP45 dust and waterproof protection. The transmitter uses advanced self-powered performance and does not need to install batteries. Exclusive Appearance and : The doorbell has been upgraded with 38 tunes and 4 adjustable volume levels. 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 anything is wrong, please contact us as soon as possible to find a solution.