OverviewPress Volume down+Volume up together to turn off backlit, once again to turn on backlit. NOTE 1: All keys Support IR learning. NOTE 2: This air mouse may be not compatible with some Smart TV because the third-party USB dongle is blocked. You need to confirm your smart TV can recognize third-party USB dongles and support other remote control except for its original remote. If you use it on the android tv box. Please install “google assistant” 1. This is a wireless air mouse with a built-in axis gyroscope and gravity acceleration sensor and fidelity voice input; it can perform the functions of traditional remote control, computer mouse, and gaming motion controller on android platform. Plug and play micro receiver is compatible with a personal computer, projector, TV box, Home Theater Personal Computer, etc. 2. Holding air mouse and rotating your wrist is converted into a movement of a cursor across the screen and it allows you to control your computer, projector and other entertainment equipment from a distance. 3. Ergonomics of air mouse will replace stationary computer mouse and infrared button remote control gives you convenience to manage your computer and television set from a position which is most comfortable for you.