The e-Tracker from Elementz features an ATmega328 and SIM808 which provides the flexibility of arduino along with the added features of SIM808 which has GSM,GPS and bluetooth functionality. The compact design which integrated GPRS and GPS in a SMT package will significantly save both time and costs for customers to develop GPS enabled applications. Featuring an industry-standard interface and GPS function, it allows variable assets to be tracked seamlessly at any location and anytime with signal coverage.It has high GPS receive sensitivity with 22 tracking and 66 acquisition receiver channels. Besides, it also supports A-GPS that is available for indoor localization. The module is controlled by AT command via UART and supports 3.3V and 5V logical level.