The Yale SensCheck Door Sensor allows you to check the door lock status and track the opening and closing of your door. If the door is tampered with, the sensor sends alerts directly to your alarm system. Check in from anywhere in the world and receive alerts and notifications on your smartphone when your alarm is triggered. The geolocation feature reminds you to set the alarm when leaving home. The Sync alarm works with Philips Hue, Google Assistant, and Amazon Alexa, combining lights, sound, and voice for an ultimate security deterrent.