... Product Description Topcon 100N SeriesFunction:The new Topcon GTS-100N series total station combines the traditional rugged field-readyquality and accuracy ... 8800ft, 2700metersMeasuring Accuracy Prism Mode ±(2mm+ 2ppm×D)m.s.e.fine,N/A measurement time 1mm: 1.2sec. (Initial 4sec ... life 9 including distance measurement,40 Angle measurement GTS-102N Series: Accuracy2,2+2ppm, Measuring Range2km/1NP GTS-105N ...