Check the listing for details. FMA MS2000 Functional Distress Strobe Marker Light Rescue Signal Lamp Survival. Condition: New. Listed at 22.86 USD. FMA MS2000 Functional Version Working Distress Marker Strobe Helmet Light Rescue Signal Light Survival Lamp Manufacturer: FMA Size :11.4x5.6x3.3 cm Weight :95 g without batteries Light output 250,000 peak lumens per Flash Flash rate 50 ± 10 per minute Light Dispersion White-omnidirectional, Infrared-omnidirectional, Blue-omnidirectional Operating life 8 hours minimum - strobe; 2 hours minimum - incandescent Visibility Military tested at a distance of 6 miles (9.6 km) on a clear, dark night Batteries Two AA alkaline or lithium batteries (not included) Case color Black with olive drab flash guard Construction Case, lens and flash guard - high impact polycarbonate; IR filter - butyrate Attached infrared (IR) filter for Night Vision Goggle (NVG) viewing Directional, shielded blue filter. Identifies strobe from ground fire Raised polarity indicators allow correct battery replacement even when visibility is low Omnidirectional white strobe emits brilliant 250,000 peak lumens Compact, lightweight and Large sliding switch for easy operation under any conditions Battery door attached to case to prevent loss Shield extends/retracts for omni- or uni-directional visibility IR filter blocks all visiblelight (lets through only IR light) Raised polarity indicators allow correct battery replacement in low or no visibility conditions New braided steel retainer keeps battery door from being lost Package List:1* Light（Don't include a helmet and batteries）