I.GeneralCRT18DrepresentstheperfectcombinationofGSMandGPStechnologies.Thismodel,withprecisedimensionsandcompactappearance,expressestheadvancedworkmanshipintheGSMandGPSfieldandisthetypicaldesigncombingcommunicationproductsandGPSservices.Asaprofessionalsecurityandpositioningcompany,wewillprovideyouwithmoreandbetterproductsandservices.Beforeuse,pleasespendseveralminutesreadingthisuser smanualinordertounderstandoperationdetailsandobtainbetterservices.II.Notices ChapterIIAbouttheDevice CRT18D,asapersonalremotepositioningdevicemadeupofGPSmoduleandGSM/GPRSmodule,iscompactindimensionsandhashighaccuracy.OnthebasisofGPSsatellitesandunderdynamicconditions,itcanprovideyouwithaccurateandcorrectlocationinformation.Withsuchfeatures,itcanbeusedtoprotectandlookforouroldpeopleandchildren.Youcanuseitforsafetypurposeandotherpurposes,suchasremotepositioningtoprotectpropertysafetyandfollowanimals. I.Components1.InbuiltGPSModule 2.Internetpositioningservicecenter,usedtoreceiveandsendpositioninginformation.II.ProductFeatures ● GPSindividualorfleetpositioning;● GSM/GPRSmodemsupportstwofrequencybands,i.e.900/1800（850/1900）MHz(options)● High-sensitivity,newworkmanshipandthemostadvancedGPSchip;● Canaccuratelypositionevenifwithweaksignals;● Canworkeffectivelyinlimitedspacesuchastheremoteandnarrowplacesinacity;● Lowenergyconsumption;● Fastsignalcapturing;● Supportssinglepositioningandcontinuoustracking;● Supportsalarmingandremotemonitoring;● Supportsfastdialbutton;● SupportsthelocationinformationinquirybySMSandInternet● Maymonitorwithoutdisturbingthetrackedpersonandrealizesreal-timetracking;● CanpositiontheholderbycallormobilephoneSMS;● Inemergency,presstheSOSbuttontohaveanaccuratepositioning. III.ProductSpecifications 1.TechnicalSpecifications GSMmoduleGSM850/1900HzorGSM900/1800MHz,twocombinationsGPSchipLatestGPSsensitivity-159dBmGPScenterfrequencyL1,1575.42MHzGPSpositioningaccuracy5-25mGSMpositioningaccuracy100-500mSpeedaccuracy0.1m/sTimeaccuracySynchronouswithGPSDefaultdataWGS-84Hotstart1sWarmstart38sMax.altitude18000mMax.speed515m/sGravitationalacceleration﹤4g 2.OthersWorkingtemperature-20---65℃Humidity5%---95%Dimensions80 49 16mmVoltageRechargeable800mAhbatteryPowersupplyDC5VStandbytime 48hButtonsOneSOSemergencybuttonforemergencyaid;Call1,Call2,ReceiveandHangupbuttons.