Mil-spec fiber reinforced polymer composite - Built-in IR strobe lights for IFF function - Weatherproof o-ring sealed battery compartment - Holds 4 AA Cell Batteries - Can run on 2 or 4 cells for output of 2.0V-3.5V - Fischer / BNVD connectors on battery pack - Available with 25" 4-Pin BNVD to BNVD power cable for connection to BNVD Night Vision systems (PVS-31, GPNVG-18, BNVD-1531, etc) or 8" 4-pin BNVD to LEMO power cable for connection to ANVIS Night Vision systems (AN/AVS-6, AN/AVS-9, etc.)