You can use this for fun, or work, or whatever you'd like. Just pop it on your dash (suction cups included), and plug it into your cigarette lighter. You could of course hard-wire it to 12v too.

You could mount two of these in your back windshield. The possibilities are endless. Just be careful not to get in trouble :)

It isn't as bright as a real cop strobe, but it still gives a nice effect, for about 1/10th of the cost.

Press the red button to turn it on, and cycle through the flash modes.