Secure a window or door with the Philips Hue Secure contact sensor. You can place the sensor directly next to your door or window. This way, it notices that a door is opening. You then receive a notification of the open door in your Philips Hue app. Connect the Philips Security sensors to your Hue smart lights and your lights turn on when a door or window is open. This way, you don't forget to close them and the light in the hallway is already on when you enter. You can place the magnet on both sides of the sensor, which makes it suitable for all windows and doors.