Keep an eye out from anywhere. No matter where you are, you can keep an eye on your home. Get real-time alerts directly on your mobile device when a sensor is opened. Feel suspicious? Trigger a light alarm with the Hue app. You can even see what time the sensor was last triggered and if someone has tampered with it. Trigger your lights. Use the Secure contact sensor to turn your lights on when it opens – perfect for frequently used areas. Have the hallway light turn on when the front door opens, for example. Get it all with the Philips Hue Bridge. A Bridge gives you the full suite of smart home security features: light and sound alarms, the Mimic presence automation and the ability to expand your home security – or smart lighting – set-up.