This product is furnished with double faced adhesive tape and it is covered with a protective membrane, you can remove membrane and stick to back windshield. Moreover, if there is a trouble for you to connect the wires in the car, you can demand to equip a lighter for cigarette instead, the lighter can be directly inserted into car to make lamp lightening. 

Power by : DC 12V

Red cord to anode and black to cathode

Easy installation:

1, Stick the light inside the rear window with a 3M sticker.
2, Connect the control box with the light using a 3meters length cable.
3, Plug the car lighter. 
Start the music, it is cool especially at night!