Here is something interesting. A music activated car stickers equalizer. Simply stick these stickers on your cars windshield (best is rear), plug it to 12VDC power and it will produce a cool effect the moment music starts. The sound activated car stickers is furnished with double faced adhesive tape, covered with a protective membrane, which you can remove and stick to back windshield. It comes with an lighter for cigarette option in case there is a trouble for you to connect the wires in the car.