... IIIGPS Channels20 channelTracking sensitivity-159dBmAcquisition sensitivity-144dBmAntennaBuilt-in GSM quad band antenna, GPS high gain antennaBattery500mAhMonitoring range5MHot start<2 ... kinds of GPS tracking system,gps navigation,gps data logger, car dvr ,gps dvr etc. to Europe, America, East ... kinds of GPS tracking system,gps navigation,gps data logger, car dvr ,gps dvr etc. to Europe, America, East ...