The CF450 offers a long list of features that makes it the only light you’ll want to carry: *Focusable beam angle from 31 degrees to a narrow 6 degrees by twisting the front bezel. *Magnetic on/off swivel switch offers one-hand operation while providing reliable and safe switching. *Stand-alone 3AAA battery holder (use Alkaline or NiMH batteries only – included). *Durable anti-corrosive aluminum alloy construction. *Double o-ring seal.