SIM 28 ML is stand-alone or A-GPS receiver with build in LNA. SIM 28M can relax can relaxed antenna requirement and don’t need for external LNA. Sim 28ML can track as low as -165 dbi signal even without network assistance.SIM 28ML has excellent low power consumption characteristics(acquisition 17mA, tracking 16 mA). Sim 28ML supports various location and navigation applications including autonomous GPS, QZSS,SBAS ranging(WASS, EGNOS, GAGAN, MSAS). DGPS and A-GPS.