This RTK base-and-rover kit pairs two SinoGNSS Mars receivers with an internal UHF radio and cellular modem, plus a handheld controller, giving a surveyor a complete out-of-the-box positioning system. Each unit tracks 60+ satellites across all major GNSS constellations and is built IP67-rated with dual swappable batteries rated for roughly 20 hours of continuous work. A built-in laser offset feature lets the rover measure points a GNSS pole can't physically reach, while the UHF datalink carries corrections between base and rover over several kilometers.