Description: This tracker is a new product based on the GSM / GPRS network and GPS satellite positioning system, which set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entirety. It can track and monitor remote target by SMS or internet. Dim:83mm x 54mm x 26mm Network:GSM / GPRS Band :850/900/1800/1900Mhz GPS chip :SIRF3 chip GSM/GPRS module:Simcom Sim340 GPS sensitivity:-159dBm GPS accuracy :5m Time To First :FixCold status 45s Warm status 35s Hot status 1s Voltage of carpower system :12V - 24V Battery:Chargeable changeable 3.7V 800mAh Li-ion battery Standby:80hours Storage Temp.:-40°C to +85°C Operation Temp.:-20°C to +55°C Humidity:5%--95% non-condensing Features: Support both GPS / GSM station positioning ways Support GPRS on-line and GPRS re-connected automatically if GPRS drops Support SMS / GPRS dual-mode switching Support SMS / GPRS dual-mode switching Set multiple functions of security, positioning, monitoring surveillance, emergency alarms and tracking in its entirety Package Included: 10 X GPS Antenna 10 X GSM Antenna 10 X Harness 10 X microphone 10 X Plug 10 X User Manual -English 10 X CD (GPS Tracker Manage Software) NOTE: You do not have to go through a 3rd party monitoring company. The Tracker only requires a SIM card from either AT&T or Tmobile, or any other SIM card carrier. The system will function and make calls so long as there are prepaid minutes available on your SIM card. SIM card is not included in the package. A free trial to your service for 7 days on the platform, extra 15$ for another year.