Usage Tips:CPIADJUSTMENT: ( Count Per Inch ). Speed of the Mouse Cursor.Adjustment ( 3 Levels ), 1, 2, 3 Level. The higher the level, the faster the speed. The default speed isset at level 21. Speed Increase: OK button + Volume + ] button for about 3seconds, the work indicator flashes quickly and thengoes off, release the button, on the basis of the increase 1 level2. Speed Decrease: [ OK ] + olume - for about 3 seconds, thework indicator flashes quickly and then goes off, release the button, and is reduced by 1 level onthe basis of the2.4G MODE: For initial use, plug a USB receiver into the USB port of device and 20-60 seconds to install driver of USB receiver. Move the mousethe mouse cursor can the screen means that pairingis successfulif it is unsuccessful, and hold [ OK and [ BACK ] buttons, LED light begin to flash. Pairing is successful when LED light stop flashingBT 5.0 MODE: 1. Before using this device, first you must turn on the BT function of thelain device2. Then long " OK + Return keys, when the LED turns to flashhe product enters the pre pairing3. Click add search devices on the main device to find this airemotes name ( Example: BT-REMOTE ). Click the name can to connecting4.ter the product is successfully connected, the direction of themouse pointer can be controlled by waving in the air5. If the connection is not successful, please perform the operationsteps of item 2-4 again6. Reconn ent efficiency description: The normal reconnent time of thiproduct is 3-5 secondster it is normally paired with themain equipment7. This product can only remember the pairing information of one maindevice, when the product is connected to a device, theconnection of historical devices is not supportedter8. in this case. you need to delete the historical connection informationof s peripheral can be successfully matched for searchWith backlight