GSM quad-band frequency; Real time tracking by SMS/GPRS;Over speed alarm ;move alarmGeo-fence alarmBuilt-in backup battery to realize failure alarm;( optional)Cut vehicle oil or circuit alarm (optional). Add Smart sleep save ModeAdd AGPS function,receive GPS signals fasterAdd built-in storage memory Content Specs.Weight: 46gNetwork: GSM/GPRSBand: 850/900/1800/1900Mhz GPS sensitivity: -159dBmGPS accuracy: 5m-10mWork voltage: 12V-36vTime To First Fix: Cold status 45s / Warm status 35s / Hot status 1sStorage Temp: -40 Celsius to +85 Celsius Operation Temp: -20 Celsius to +55 Celsius Humidity: 5%--95% non-condensingColour: blackMaterial: PVCSize: 9x 4.5x1.6cmPackage contents: 1 x Car Vehicle GPS Tracker.1 x Cable.1 x User Manual.4 x Locking Bolts.Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.