![door chime](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
Wireless Door Chime kit includes a plug-in receiver with a battery-operated door contact sensor which is super easy to use. When the two parts of the door sensor are separated by more than 0.4 inches, the door sensor will be triggered, then you will hear the ringtone from the receiver. In this way, it can help deter break-ins, keep your children and pet safe, and never miss a customer when they come. It is ideal door alarms for home, office, store, warehouse, garage, and more!