Weatherproof Doorbell-IP55 waterproof rated front doorbell that can withstand harsh weather (operates in -22 F to 158 F). Low power transmitter with durable and easy to use 12V23A battery for long life Extra-Long Wireless Coverage- This wireless doorbell has a long-range connection of up to 1300 feet, and the strong and stable wireless signal ensures you can hear the doorbell ringing clearly, even if you are several rooms away or in another Floors Loud Doorbell-Plug-in doorbell receiver features 55 chimes and 5 adjustable volume levels ranging from 0 to 110 dB. The built-in memory chip will remember your last settings, no need to reset after power outage Easy and Quick Installation- Simply plug the receiver into the power outlet and secure the button to the exterior wall within 30 seconds. You can install it anywhere in your home, garden, office, mailbox, etc. Expandable Doorbell System- Up to 64000 learning codes means you can add the same model of receivers and buttons to expand your home doorbell system