... .Excessive speed alarm; 5.CDMA(option), GSM, GPRS GPS GRPS car trackerSpecification/parameter:Working voltage: 8-36V/DC ... 4 HoursInside battery working time: 3-5 HoursFunctions:Positioning(GPS, Target location)Target trackingBlind area replenish reportEmergency alarm, mute ... :GPS Main Device, GPS Antenna, GSM Antenna, TTS voice report device,Power Supply cable, Panic Button, Lock Vehicle relay, Monitor ...