Features: 1. Two flash types: Multicolor flash and monochromic LIGHT. It is controlled by two special switches respectively. 2 Made of cycle flash IC and super bright LED. With special design, it can form beautiful pattern, and make your car more romantic. 3. Saving energy and long life span. Installation: 1. Before installation, cut down the power of storage battery, then take off the former car roof lamp, drew out the origin electrical wire and make sure that every wire's collection is right. 2. As the direction picture said, make the car origin connection line drill through the center hold of product's base board, then fix it firmly with screw (using the origin screw is the best). 3. Tie up all connect wires, and then put the wires in to car roof. At the same time fix the product firmly. Attention It suits for DC12V car only. QTY：30 G.W.：8.80 KG N.W.：7.83 KG MEAS：56.5x38x30cm