The TTU-2820 is an excellent tracking device from CalAmp that comes with a small size and high-performance GPS. It offers GPRS, CDMA, and HSPA network support and is most commonly used for real-time vehicle monitoring.

Features:

IP66 casing
Internal GSM and GPS antennas
Super sensitive GPS
3G
3-axis accelerometer
Rechargeable battery pack (3.8 Ah lithium-ion)
Ultra-low-power safe mode
Voltage monitoring
Blackbox
32 built-in geo-fences
ADC and Digital sensors
Remote management