【Ready to Use】 This doorbell is pre-paired before shipping. Installation takes less than a minute, eliminating the need for wiring or calling an electrician. Simply plug the receiver into a socket and it's ready to use. 【Long Range】 This is a wireless remote control doorbell utilizing high-frequency electronic technology with FM signal transmission. It features strong anti-interference capabilities and 1-to-1 signal pairing. There's no need to worry about signals accidentally connecting to a neighbor's house. The detection distance reaches up to 300m in an obstacle-free environment. 【Convenient Living】 The number of ringtones has increased to 58 (including a Merry Christmas ringtone), and 5-level volume adjustment is available (0-120dB). You can add more as needed. You can choose sets such as 2 buttons with 1 receiver, 1 button with 2 receivers, or 2 buttons with 3 receivers. 【Weatherproof & Energy Saving】 The doorbell is made of high-quality ABS material, with excellent fire resistance and flame retardancy. Operating temperature: -20 to 60°C (4 to 140°F). IP55 dustproof and waterproof performance. The receiver adopts an optimized circuit design. The transmitter consumes no power unless the button is pressed. Battery life: 3 years. 【Well-Considered Design & High Quality】 This doorbell combines ingenious and novel industrial aesthetics with fashionable design. It is manufactured with industry-leading automated equipment and a high-precision assembly environment. Y083