General description This AlwaysH Waterproof Outdoor Wireless Doorbell features a long-range of 300m (1000ft) and includes 2 transmitters linked to 2 receivers. It offers individual pairing for each button, allowing you to know which door someone is at. With 36 melodies and 4 adjustable volume levels, this doorbell ensures you can hear it clearly throughout your home or office. Technical specifications Wireless range: 300m / 1000ft Max sound intensity: 85dB Volume levels: 4 adjustable levels (25dB to 85dB) Internal sounds: 36 chimes Transmitter power: 1 x 12V 23A battery (included) Input voltage: AC110-240V 50/60Hz Waterproof rating (transmitter): IP44 Installation No wiring required Plug the receiver into an electrical outlet Install the push button using included double-sided tape or screws Template for drilling screw locations included Usage Easy to use with clear sound and visual indication via blue LED Memory function for sound and chime selection Two receivers can be placed