To call the SureFire UDR Dominator a mere flashlight would be an understatement, the UDR Dominator is more like a handheld spotlight that can produce a massive 2400 lumen beam that will turn night into day at distances up to 900 meters. While it's max output is impressive, it also features 8 additional output settings for situations that don't require such a high degree of illumination, as well as a strobe feature for signaling. The UDR Dominator has three modes: Momentary-on which activates the light for as long as the switch is toggled, constant-on which keeps the light activated until switched off and MaxBlast which instantly activates the highest power output. In addition, the UDR Dominator has a disable function, which completely deactivates the light for safe storage and transportation. The UDR Dominator recharges with a standard 120V AC outlet or 12-volt DC socket, and features a fuel-gauge to keep track of the charge status. Features of the SureFire UDR Dominator: Nine output levels, 2400 lumen max output, 14 lumen output minimum900 meter illumination distance (max output)2.25 hour runtime (max output)22.75 hour runtime (lowest output)Rechargeable lithium-ion battery or (12) 123A lithium batteries SureFire UDR Dominator Rechargeable Ultra-High Multi-Output LED Flashlight UDR-A-BK