General description This wireless doorbell is designed for outdoor use, featuring a waterproof chime and two plug-in receivers. It operates without batteries, making it an eco-friendly choice. The doorbell is equipped with a temperature and humidity sensor, allowing you to monitor indoor conditions in real time, along with a time display to keep track of important moments. Technical specifications Working temperature: -4°F to 140°F Detection distance: up to 600 feet in an obstacle-free environment IP45 dustproof and waterproof protection Volume levels: 4 adjustable levels from 0 dB to 100 dB 38 different chime melodies Installation No wiring or electrician installation is required. The installation process is straightforward and can be completed in just one minute: simply plug the receiver into a socket, and it is ready to use. Usage This wireless doorbell is perfect for home use, providing a reliable and convenient way to be alerted when someone is at your door. The built-in