GSM module: SIMCOM 340DGPS module: MTKFour band Logger function ( can stock 32768 points)Can record track without GSM networkRecord interval is 5-30 seconds according the speed of the trackerBuilt in shock sensor to control GPS function On/ OFF to enlarge battery lifeShock sensor can be used as car shock & move alarmUpload History Track to Website By GPRSWorking method: locate with GPS signal, send back with SMS or GPRS Last location report when without any GPS signal .Can preset 3 phone number by SMSSMS locateLink LocateLow battery alarmOver Area Alarm (Geo-fence Alarm)Move AlarmOver speed AlarmSOS function Only SMS charge (Low charge)No installtion charge GSM and GPS antenna are embedded in the unitReal time track model Level IP56 waterproof ( watere proof design)With Magnet design can be attracted anywhere on the metal of car bodyBuilt in rechargeable polymer Li battery (Battery Life 7-15 days) 4 kind location way !Use latitude and longtitude to locate Use link to locateUse SMS to locate Check 3 month track data Electronic Specifications:Unit Size: 64x42x16mmNormal Operation Temperature:-20C to +55CRestricted Operation Temperature:-35C to +70CStorage temperature:-40C to +80CStorage temperature:-40C to +80CGSM Frequency:850/900/1800/1900 MHzGSM & GPS Antenna:Built-inGPS Channels:32Locate Accuracy:5~10mGPS Start Time (open sky):Hot Start : 1 sec, Cold Start : 36secStandby Current:1-2 mA Tracking Current:35mACharge Voltage:5VBattery:Li-ion 1800mAh (BL-5B) Free location service website and ; Package list & Detail1 Main unit , 1 AC recharge adapter(110/220V), 1 car recharge adapter, 1 manual. Unit Size: 64x42x16mmMain weight: 130g gift box: 20cm X 5cm X 2.5cmPackage Dimension: 49cm*45cm*29cm Weight: 0.6kg Quantity Per Carton: 32set