Encased in extremely strong CNC-milled, anodized aircraft-grade aluminum. Water resistant to 200M through the use of a EPDM waterproof seal. Protected from vibration or impact damage through the use of a molded shock dampening collar. Plug-&-Play with any USB 2.0 certified peripheral computer port (backward compatible with USB 1.1). Windows Vista/XP/2000 compatible only. USB extension cable and Dog Tags included