... .Real-time sms/gprs tracking 3.Work worldwide (850/900/1800/1900mhz) 4.Remote control 5.Anti-theft GPS ... GSM /GPRS modem supports two frequency bands, i.e. 900/1800(850/1900)MHz(options) High-sensitivity, new workmanship and ... 5. Product Specifications (1). Technical Specifications GSM module850/1900Hz/900/1800MHzGPS chipSIRF3GPS sensitivity-159dBmGPS center frequencyL1, 1575.42MHzGPS positioning ...