The digital wire-control HID product with adjustable brightness control, is specially designed to adapt to all kind of environment and driver's needs/preferences. It is the latest product in the world. The level of brightness can be adjusted using the controlboard which is installed in the cab. It has five levels which are suitable for different situations. The first level, is for city road use which has street light of strong brightness.The second level, is used for suburb road with street light. The third level, is for normal road use without street light. The fourth level, is for freeway use without street light.The fifth level, is suitable for off-road vehicle use as well as rainy and foggy days . You will be surprised by our new innovative HID product and the excellent lighting effects. We sincerely welcome you to come and experience the new way of HID lighting.