The Philips Hue Outdoor Motion Sensor automatically turns on the Philips Hue Smart Lights you want, both outdoor and indoor.The sensor detects variations in infrared radiation in its environment, allowing it to detect human movement and automatically turn on the lights (sensor motion sensitivity can be adjusted in the app). By connecting the motion sensor to your Hue hub via the Philips Hue app, you can choose which of your Philips Hue lights go on, both inside and outside your house. Also choose the scene or light setting that should be triggered. The integrated dusk-to-dawn sensor ensures your lights only switch on when it is actually dark outside helping you to conserve energy. This Philips Hue outdoor sensor is specially designed for use in outdoor environments and has undergone rigorous tests to ensure its performance. Certified by UL, the product will withstand heavy rainfall and other weather conditions.​ 160 degree horizontal/80 degree verticle view angle with 39 ft x 8 ft detection radius. Optimized for far range and close proximity (antering and leaving home). Able to fix the motion sensor on both a flat wall and corner.