Nexia Z-Wave Doorbell Sensor, DB100Z The Doorbell sensor connects directly with your Doorbell Chime and communicates through nexia's web or mobile app to let you know when someone is at your door Gain a sense of security knowing that you can monitor when people are approaching your home Simple installation- attach the sensor to your Doorbell Chime box with hardware included Receive alerts directly to your smartphone when someone has rung your Doorbell Sync your Doorbell sensor with other Nexia- compatible products such as an outdoor camera, so you can pull up a live video of your front porch or record for later viewing