2012 Upgrade Mini Global Real Time 4 bands GPS Tracker ... optional 2GB external SD card at most.3) Sleep function, can standby 15 days (under SMS mode) 4) Powerful magnet ... -time track, get longitude, latitude, speed and time, also can get real adress name by setting APN.10) Auto track ... hear the sound around the tracker.16) State checking function: can check state of GSM, GPS, GPRS and battery.17) Double ...