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% NewVoltage: DC 12VRated Power: 5WCurrent:10ASize:29cm*14cm*10cmWire Connection:Blue Wire - PositiveWhite Wire - NegativeFitment:Fit all kind of vehicle with 12V working voltageNote:There Are No Instructions Included In This Kit.Professional Installation Is Highly Recommended!colour:YellowMaterial:ABS Package Contents:1 * Roof Top Sign LightOnly 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.