GPRS SMS Vehicle Car GPS Tracker Device Alarm System

This tracker GPS103A is a new product based on the GSM / GPRS network and GPS satellite positioning system. It provides multiple functions, such as security, positioning, surveillance, emergency alarms and so on.
Features:
GPS/GSM station positioning.
SMS/GPRS/internet network data transfer.
Point-to-point, point to group, group-to-group monitoring.
Continuously auto track upon different time and distance intervals.
Absolute street address with GSM network.
SD card for data logging.
Can be installed on Bus, taxi, truck, car, etc.
Maximum 5 cell phone numbers are allowed to admin the tracker.
Other functions: SOS, Geo-fence, movement alarm, over speed alarm, accident alarm, voice monitoring etc.
Cut off the oil and power system.
The on-line web page tracking software has one month free trial, afterwards cost about 10USD per year.
Optional accessories:
Shock sensor and siren.
Note: the optional accessories are not include, to purchase them, please contact the seller.
Specifications:Content Specifications
Network GSM/GPRS
Band 850/900/1800/1900Mhz
GSM/GPRS module SIM900B
GPS module SIRF3 chip
GPS sensitivity -159dBm
GPS accuracy 5m
GPS start time 
Cold status 45s
Warm status 35s
Hot status 1s
Voltage of car power system 12V ~ 24V
Backup battery 
Rechargeable 3.7V 800mAh Li-ion battery
Storage Temperature -40°c~ 85°c
Operation Temperature -20°c ~ 65°c
Humidity 5% ~ 95% non-condensing
Item size 10.5 * 5.5 * 2.5cm (4.1 * 2.2 * 1.0in)
Item weight 105g / 3.7oz
Package size 19 * 13 * 5.8cm (7.5 * 5.1 * 2.3in)
Package weight 567g / 1.25Lbs