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1. gps+lbs dual positioning ways: if the gps signal is good, the device will locate via gps satellite, if not, the device will locate via lbs under gps locating mode, the accuracy is 5-10 meters, under lbs locating mode, the accuracy is 100-1000 meters2. realtime tracking: you will can realtime track the device on google maps via mobilephone, tablet and computer, and the minumum data upload interval is 10 secondsplease get a suitable sim card for this gps tracker, the sim card must be compatible with 2g gsm network, and must be normal size sim;