Wireless doorbell, waterproof self-powered battery-free outdoor wireless doorbell, displaying temperature, humidity and time, wireless ringe-Wireless doorbell, waterproof self-powered battery-free outdoor wireless doorbell, displaying temperature, humidity and time, wireless ringer with 38 melodies and 4 levels of volume. Product Description Ready to use】：This waterproof wireless home doorbell is paired before delivery. No wiring or electrician installation is required during use, installation can be completed in 1 minute: plug the receiver into the socket and it is ready to use. [Long Distance]: This high frequency electronic technology wireless remote control doorbell uses FM signal mode, strong anti-interference ability and one-to-one signal matching. No need to worry about a bad signal connection next to it. And the detection distance is up to 600 feet in an obstacle-free environment. 【Temperature, humidity, time HD display】The wireless doorbell is equipped with temperature and humidity sensor, which can understand the change of indoor environment temperature and humidity in real time, so you can enjoy a healthy life. Time reminder function, so you don't miss any important moments. [Weatherproof and Energy Saving】: wireless battery doorbell is made of high quality ABS material with excellent fire retardant and flame retardant properties. Operating temperature: -4°F -140°F. IP45 dust and water protection. The transmitter adopts high-end self-powered performance, no batteries need to be installed. [Beautiful appearance, high quality]: doorbell updated with 38 songs and 4 levels of volume adjustment. From 0dB to 100dB with 4 adjustable volume levels (with mute function). We have advanced automatic equipment with high precision placement. We strictly control the quality of our products. If a problem occurs, please contact us as soon as poss