The high value of the LMU-800 tracking unit from CalAmp features a small size, superior GPS performance, a 200 mAh internal backup battery, ultra-low power sleep modes, 3-axis accelerometer for motion sensing, and three inputs/three outputs (I/O). The LMU-800 is a complete vehicle tracking and communications device incorporating next-generation, high-sensitivity GPS technology on GSM/GPRS/CDMA 1xRTT/HSPA cellular networks for installation in any 12 or 24 volt mobile vehicle. Internal antennas and quality for cellular and GPS eliminate the need for wired antennas and make the LMU-800 mountable in virtually any location on the vehicle for easy, low-cost installations. Messages are transported over the cellular network using enhanced SMS or UDP messages providing a reliable communication link between the device and application servers. The LMU-800 is designed to drastically reduce cost of ownership, power, and size while offering excellent field reliability.