... vehicle GPS tracker with battery standby 50-60 days,working with real time tracking PC software for free and server. Portable Vehicle gps trackerModel: ... enters into underground parking lot or other GPS blind area, the tracker will inform you the last orientation.*Tracking ... 1 external GPS antenna , 1 external GSM antenna,one 12V relay,1 cable Portable car GPS tracker with magnet ,battery standby 50- ...