... Feature1,newest intelligent micro-computer controller.2,long sevice life,with high led bulb3,built-in led light4,firm structure ... with aluminum alloy body,able to use as a self-defense ... range ballast of 6V(5-18V), 12V(9-18V), 24V(9-32V) with power range of 10W, 15W, 18W, 21W, 24W, 35W ...