... for children, old man, disabled people and pet.Through GPS and GSM or GPRS communication, MT90B can get its ... -condensingGSM ModuleQuad Band GSM 850/900/1800/1900MHzGPS ChipsetLatest GPS SIRF-Star III chipsetGPS Sensitivity-159 dBGPS FrequencyL1 1575.42MHzC ... 2D RMSVelocity Accuracy0.1 M/STime Accuracy1 us synchronized to GPS timeReacquisition0.1 msHot Start1 sec., averageWarm Start35 sec., averageCold ...