High-precision 2-antenna GNSS-receiver (satellite compass) with the possibility of issuing coordinates and heading. Works on both reception and transmission of RTK corrections. Possibility to connect via TCP/IP. Transmits corrections in the RTCM 2.x, 3.x, CMR. Raw data is easily converted to RINEX format with the free utility. Optionally has an embedded UHF or GSM modem, a Beacon signal receiver, also include INS (inertial system).