... waterproof, dustproof and anti-drop.V30 Technical Parameters: Signal Channels: GPS: L1 C/A, L2E, L2C, L5 GLONASS: L1 C/ ... Hz, 5 Hz, 10 Hz, 20 Hz (default 10Hz) Differential data format: CMR, CMR+, RTCM2.1, 2.2, 2.2, 3.0 ... , 3.1 Output format: ASCII: NMEA-0183 and binary data: Trimble GSOF Accuracy: For static, fast static ... -55~+85 a lasted advanced multi-channel, multi-frequency RTK GPS system