The UDR Dominator(R) is just under 12 inches long but its advanced LED technology – powered by either the included rechargeable Lithium-ion battery or twelve 123A disposable batteries – produces a maximum output of 2″400-lumens of dazzling white light at its high setting and eight decreasing output levels down to 14 lumens. Specific lumen outputs are: 2400″1275″ 675″ 350″ 180″ 100″ 50″ 28″ 14. The Dominator is ideal for military” border security” and maritime applications” or any mission where an ultra-bright” portable white-light spotlight/searchlight is vital. This includes search-and-rescue operations where covering large areas thoroughly and rapidly is critical. The easily selectable lower-output levels expand the utility of the UDR by allowing the output to match different task requirements” and by providing the ability to extend the total runtime per battery charge or set of batteries. Additionally” a strobe mode can be selected for tactical applications or signaling purposes” and an extra-long lanyard provides convenient carry options when it’s not in active use. Three separate pushbutton head switch lets you activate the light constant-on” momentary-on” or MaxBlast(TM) modes” the latter always delivering maximum output mode at any selector ring position except Off/Disable. NOTE: When disposable 123A batteries are used in the UDR Dominator” runtimes at all settings are increased. See Specifications above.