A tracking device (10) configured to track a shipment of cargo is provided including a housing (20) having a complementary top portion (22) and bottom portion (25). The top portion and the bottom portion of the housing are pivotally coupled. A tracking unit, arranged within the housing, includes a processor configured to collect and transmit data. A power unit having at least one power source is arranged within the housing and is configured to supply power to the tracking unit. A circuit board connects the power unit and the tracking unit. The circuit board includes a metal tab arranged adjacent a conductive interface. A portion of a pull tab (80) formed from a thin, non-conductive material is arranged between the tab and the conductive interface. The tracking device is configured to transform from an inactive state to a fully active state upon removal of the pull tab (80).