Housing constructed from bulletproof Lexan™.  Aircraft aluminum carrier supports two D-cell batteries (below) and a four gang universal circuit bus card (above).  Bus is based on UC Berkeley’s non-proprietary standard for maximum compatibility.  The aluminum carrier rotates freely on shock-mounted bearings to ensure internal antennas always point upward.   The entire package has been impact tested and flight tested in field trials conducted by the US military.  A foam sleeve provides the only impact protection needed for air-deployment.