Product name:i80 smart GNSS receiver Contellation tracking:GPS, GLONASS, BeiDou, Galileo, SBAS Static accuracy for RTK instruments:2.5mm +0.5ppm, 5mm+0.5ppm RMS RTK accuracy:8mm+1ppm, 15mm + 1ppm Channel:220 channels Internal momery:32GB Application:Topographic survey, engineering survey, marine survey Special feature:LED sreen, Tilt sensor, Ebuble Show More