The ATAC A2 Tactical Flashlight is the best blend of high performance and low cost power source. Powered by (2) AA batteries, the ATACA2 Tactical Flashlight throws a brilliant 162 Lumens of light in a smooth tactical beam pattern while providing 1.75 hours of runtime on (HIGH) and 75 hours of runtime on (LOW). The Tactical Intelligent switch is designed to silently cycle through all 3 light modes (High/Low/Strobe) using only the Momentary-On function to prevent the “Click” sound from potentially giving up your location. Another tactical feature developed by professionals for professionals is the Break-Away Lanyard designed to free your arm from the flashlight in the event of an emergency. The ATAC A2 is compatible with 5.11 Tactical"s part # 53144 - ATAC Belt Clip/ Holster Accessory. Like all 5.11 flashlights the ATAC A2 has been tested To ANSI FL1 Standard.