... speed alarm; 5.CDMA(option), GSM, GPRS GPS GRPS car trackerSpecification/parameter:Working voltage: 8-36V/DC (limit voltage 100V ... (L×W×H) (aluminium alloy crust)Weight: 0.32kg (main device net weight)Communication mode: GSM/GPRS/CDMASupport frequency band: 850MHz ... need ACC switch)Relevant accessories:GPS Main Device, GPS Antenna, GSM Antenna, TTS voice report device,Power Supply cable, Panic Button, ...