Gsm GPRS Modem with Low Price Low Price. 1.Frequency:L1, 1575.42 MHz 2.C/A code:1.023 MHz chip rate 3.Channels:28 Gsm GPRS Modem with Low Price, High Performance, Good Quality, International Approvals, Prompt Delivery, Small Orders Accepted.4.1.1 General1).Frequency:L1, 1575.42 MHz.2).C/A code:1.023 MHz chip rate.3).Channels:284.1.2 Accuracy (Open Sky)1).Position:10 meters, 2D RMS.2).7 meters 2D ...