Note: After receiving Package, the backlight is turned off by default. You need to turn the backlight on according to the video instructions. Charging requires 5V, 2A. The red/blue indicator light is used when charging. After fully charged. Please press the video button at the same time to turn on the backlight. Note: The red indicator light is used when charging. Blue indicator when it is full or can be started normally. After fully charged. Please press the video button at the same time to turn on the backlight. Wireless Car Steering Wheel Remote Control Multifunction button Night Smart Backlight for Android Radio Navigation Universal Product Information Model: 10-Key Touch Long Bright Square Control Model: Hig-end configuration （Smart Backlight） Lights: Backlight automatically lights up at night Adaptation: 98% of the retrofit navigation on the market can be used Transmission method: high-frequency encrypted signal + receiver Working voltage: 12V car) -24V (lorry) Battery: coin cell 2025 Material: rubber comfortable soft material Size: 12.3 * 3.3 * 4.7CM Installation: non-destructive installation on the card can be installed at any steering wheel position can be applied more No need to paste: prevent the paste from warping, deforming and falling off when exposed to high temperature and low temperature No need to open holes: non-destructive installation is convenient and fast without damaging the original car's steering wheel Include Micro USB wire for charging both the remote with a battery and a separate mini charging for the battery. The module has 5 wires, green (ANT) the antenna is not connected with anything Red (ACC ) Connected to DVD navigation ACC power cord black (GND) Connect to DVD navigation cable White (Kay1/2) Connected to DVD navigation side control harness (AD1/2, SW1/2) Note：IF there was only Kay 2, so both white wires of the module twisted with the radio. Scope: car, van, van, electric car, large screen, small screen, universal machine navigation Package include: 1 x steering wheel control 1 x Universal wiring harness 1 x USB harness