This musical wireless doorbell chime connects to your existing traditional hard wired doorbell and extends where you can hear your doorbell from. Once the unit is wired into your existing system, the included receiver can be plugged into any standard electrical outlet up to 500' from the existing doorbell. This allows you to hear when someone is at your front door when you are in the basement, garage or other part of the house or business, where you normally can't hear your doorbell.
Note: This product may not work properly with some door chimes that play melodies or use batteries.