ManufacturerSpecificationsMainFunction:GPSTrackerwithSOSCallingFeatureGSM:Quadband850MHz,900MHz,1800MHz,1900MHzGPSSensitivity:159dBGPSFrequency:L1,1575.42MHzGPSPositionalAccuracy:5m-25mVelocityAccuracy:0.1m/sVelocityLimit:515m/s(1000knots)AltitudeLimit:18000Meters(60,000Feet)TypicalBatteryLife: 40hrsStartUpTimes(Acquisition)-HotStart:1Sec(avg)-WarmStart:38Sec(avg)PowerSource:3.7V800mAhLiIonBattery(USBRecharging)Dimensions:L:75xW:45xD:23(mm)ManufacturerRef:JKUTD45BRL5Q ProductNotesLEDstoIndicateStatusUpdatesviasenttextmessageEasilyEnterCoordinatesintoGoogleEarthforVisualIndicationofLocation.Thekeyontheunitcanbehelddownfor3secondstoemergencycalltotheremotephone,or6secondstosendSMSlocationmessageNote:ThisitemsendsSMSmessagesthoughaGSMcellularnetwork.YourSIMcardmustyouinstallinthisproductmustbeaworkingSIMcard(anactiveaccount).Ifyouplantoresellthisiteminyourowncountry,themostcommoncategorynamesforthisproductare-GPS-Gadget,GadgetsGPS,GadgetGPS, ? GPS,GPSгаджеты,ElektronikaGPSModulok,ModulGPSPackageContentsforModelHC506QuadbandGPSTrackerInstructionManualUSBCablePowerAdapter(100-240V)RechargeableBL-5C1020mAhLithiumBattery(3.7v,3.8Wh)FAQ-FrequentlyAskedQuestionsIhavetriedeverythingandIcannotgettheGPSTrackertosendmeaSMSmessage,whatiswrong?Youlikelyhaveoneoftwoproblems-First,doestheSIMcardhaveabalanceorisitpartofanactiveaccount?MakesuretheSIMcardworks.Second,doestheSIMcardyouinsertedhaveaPINcodeorsecuritypasscode?YoucannotuseaSIMcardswithasecuritypasscodeinsidetheGPStracker.