car GPS Tracker M528 with competitive price

1.SMS and GPRS TCP/UDP Communication 2.Track by Time Interval and call roll 3. Cut off the car engine when in urgency 4.Group telephone chrs 5.SMS of mobile and gprs 6.Mileage function 7.Remotely monitor by authorization 8.High low-level output voltage measuring 9.Record data logging function 10.Remotely lock vehicle 11.SOS alarm 12.Cut power alarm 13.High and low voltage alarm 14.Overspeed alarm 15.Parking alarm 16.Illegal open door and illegal start engine alarm 17. Internal flash memory 16MB : When theM528 is disconnected to the system (for example, the GPRS signal is weak), the position data will be storing in the flash, and then it will upload again after it reconnect to the system (the GPRS signal is ok). 5.Parking alarm16.Illegal open door and illegal start engine alarm 17. Internal flash memory 16MB : When theM528 is disconnected to the system (for example, the GPRS signal is weak), the position data will be storing in the flash, and then it will upload again after it reconnect to the system (the GPRS signal is ok). 18.support remote update Dimension101mm*50mm*24mmG.W0.5KGExterior Power SupplyDC8V-36VInner Lithium batteryLast more than 4 hoursCommunication protocolUDP/TCPGPS Sensitivity-159dBmGPS frequencyL1,1585.42MHZC/A coding1.023 MHz chip raterouteway20Default dataWGS-84Height restriction6000 feetSpeed restriction1000 knotsAcceleration restrictionLess than 4gExterior GSM antennaReceive GSM Signal betterExterior GPS antennaReceive GPS signal betterPower ConsumptionActive mode(avg.)50mA-160mAwhen exterior voltage is 12VSleep mode <20mAOperating Temperature Range-20°C to +70°CHumidityUp to 95% non-condensingposition accuracy10-metres,2D RMSGSM chipsupport Tri-band(900/1800/1900 MHz) , Quad-band(optional)GPS chipSIRF Star III (super sensitivity and high accuracy)Hot start1 sec., averageExpansion of peripheralThree peripherals(handle/camera/ scheduling screen)LED lightRed:power-on state,yellow:communication module state,green:GPS module working state