The Super Tac is an extremely high performance flashlight running on powerful CR123a lithium batteries (included with puchase). This light features Streamlight's own C4 LED technology for incredible outputs and runtimes. The tactical tail switch allows for momentary of consistent On/Off functionality with fully one-handed operation. The deep dish reflector allows for truly impressive throw distances at a maximum throw of 346 meters. Ideal for search and rescue, law enforcement, industrial, and consumer use - you just cant go wrong with the Super Tac from Streamlight.