Philips Hue Motion Sensor adds convenience, peace of mind, and energy savings to your Hue system. The sensor itself is battery powered and completely wireless allowing it to be used anywhere in the house and it can be moved at anytime. Works with the Philips Hue app. The sensor can be free standing or mounted on a wall and uses daylight sensing with Passive InfraRed (PIR) technology and adjustable sensativity. Detect movement within 100 degrees of the sensor and can be adjusted up to 60 degreese either horizontally and vertically. Can connect via Zigbee Light Link.