The 12 volt model is powered by the 12 volt electrical system of your aircraft.
The strobe bulb on both systems fires a rapid double flash on one head and then the other in an alternating pattern. The first flash catches the eye and the second identifies your position. Total flash rate is 74 per min.
Average current draw is less than 2 Amps. The drivers measure 4 ½” X 3 ½” X 1 ½” and weighs 10 ounces.