Feature: 1. Tunnel mode: in order to speed up the reaction when entering the tunnel. Operation: AUTO-0-AUTO. The backlight flashes once, opening the tunnel mode. The backlight flashes two times, closing the tunnel mode. 2. Width lamp: open a width lamp to help others observe your car. Operation: AUTO-width lamp-AUTO 3. Headlights: it is suggested that the headlights be opened later to help the light stability. Operation: AUTO- headlight -AUTO 4. The linkage between the width lamp and the front fog lamp: Operation: AUTO- width lamp - pull out fog lamp - front fog lamp -AUTO. If the module flashes once, it opens the linkage. Flashes two times, then the linkage is lifted. 5. The linkage between the headlights and the front fog lights: Operation: AUTO- headlights - pull out the front fog lamp - the fog lamp before closing -AUTO. If the module flashes once, it opens the linkage. Flashes two times, then the linkage is lifted. Specification: Material: Plastic Color: Black Dimension: 63x66mm Wire length: 115cm/45.28inch Package size: 14x8x8cm Fitment: For GOLF mk5 mk6 Tiguan Passat B6 Touran Jetta MK5 Attention: Before the initial use, peel off the protective film from the panel At least 6 hours of direct sunlight is recommended, as the brightness and duration of illumination are depended on the intensity of solar energy in storage. Package Included: 1 x Headlight Switch 1 x Instruction