General description The AlwaysH Waterproof Automatic Outdoor Wireless Doorbell is a battery-free solution designed for convenience and functionality. It features a temperature, humidity, and time display, along with 38 melodies and 4 adjustable volume levels, making it a versatile addition to your home. Technical specifications Operating temperature: -4°F to 140°F Dimensions: Doorbell size - 68 x 22 x 100 mm; Remote control size - 44 x 19 x 77 mm Supply voltage: 110-260 V Power consumption: 0.01 W Detection range: Up to 600 feet in open environments Scope of application: 150-200 meters Volume levels: 4 adjustable levels from 0dB to 100dB Installation No wiring or electrician installation is required. Simply plug the receiver into an outlet, and it is ready to use in just 1 minute. Usage The doorbell is equipped with a high-frequency electronic technology that uses FM signal mode for strong anti-interference ability and one-to-one signal matching. It also includes a time reminder