... monitoring; 4.Excessive speed alarm; 5.CDMA(option), GSM, GPRS GPS GRPS car trackerSpecification/parameter:Working voltage: 8 ... aluminium alloy crust)Weight: 0.32kg (main device net weight)Communication mode: GSM/GPRS/CDMASupport frequency band: 850MHz/900MHz/1800MHz ... ACC switch)Relevant accessories:GPS Main Device, GPS Antenna, GSM Antenna, TTS voice report device,Power Supply cable, Panic Button, ...