Sokkia's latest addition to its GCX line of GNSS integrated receivers, the GCX3, features advanced constellation tracking, open format software compatibility, and longer range base to rover communication. The receiver features radio-free RTK (Real Time Kinematic) operation via multi-channel, long-range Bluetooth technology. When used as a base station, one GCX3 may support up to three concurrent rovers at a range of more than 300 meters. Each receiver may be used as a base or as a rover.