Magnetic base (Easy attach on the roof) High quality and bright bulbs. No delay in lighting, much , prevent the rear-end collision danger. Power ON indicator light. Easy installation, just attach the light on the roof ( plug is not included). Waterproof and sun-proof design. Adopt big and stable chip. Condition:100 percent New Voltage: DC 12V Rated Power: 5W Current:10A Size:29cmx14cmx10cm Wire Connection: Blue Wire - Positive White Wire - Negative Fitment: Fit all kind of vehicle with 12V working voltage Note:There Are No Instructions Included In This Kit.Professional Installation Is Highly Recommended! colour:Yellow Material:ABS Package Contents: 1 x Roof Top Sign Light Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.