The AT312TT is part of the AGPS1 asset tracking line. Unlike the AT312EQ, it has the ability to track in real time. This unit has been specifically designed and engineered to update on a daily basis (if not connected to power) or on a 30 minute continuous-tracking plan (if connected to power). When the unit is connected to power it will send an Auto Locate every 24 hours. If the unit is not connected to power then it will work off the internal battery and give an Auto Locate every 8 hours. The device will automatically generate Unauthorized Movement Alerts once it has traveled 3 miles or more. It will continue to provide an alert every 30 minutes until stationary. The AT312TT is built to withstand harsh environments and can function in up to 1 meter of water. Its cellular and GPS antennas are completely integrated. It also has an internal motion sensor and internal battery.