1 Handy EDM Head 2 Complete Application Programs 3 Extended Internal Memory (Max. 24000 Points) 4 Convenient Data Management System 5 Superior Waterproof & Dustproof Capabilities, IP66 6 Min. Reading 0.1mm NTS-352R Telescope: Image Erect Magnification 30× Effective aperture Telescope:45mm(Object lens:50mm) Resolving power 4″ Field of view 1°30′ Minimum focus 1m Tube length 154mm Angle Measurement Measuring method absolute encode Dia of circle(vertical, horizontal) 79mm Minimum reading 1″ 5″Selectable Detection method Horizontal: Dual Vertical: Dual Accuracy 2″ Distance Measurement: fine weather condition Max. Range single prism 5km Triple prism 6km mini prism 800m Reflectorless 300m Displaly Max:99999999.9999m Min:0.1mm Unit m/ft Accuracy Reflectorless Fine ±(5mm+2ppm@D) Tracking ±(10mm+2ppm@D) Reflector Fine ±(2mm+2ppm@D) Tracking ±(5mm+2ppm@D) IR sheet ±(5mm+2ppm@D) measuring time Fine mode:1S;Tracking mode:0.5s Atmospheric correction Auto correction by inputting parameter prism constant correction Auto correction by inputting parameter Vial Plate vial 30″/ 2mm Circular vial 10′/2mm Auto Vertical Compensator Type Liquid-electric Detection Compensation range ±3′ Accuracy 1″ Optical Plumment Image Erect Magnification 3× Focusing range 0.5m~∝ On-board Battery type Ni-H ,Rechargeable Voltage DC 6V charging time 3hrs Continuous operation time 8 hrs (small battery);10hrs (big battery) Others Display LCD, 4 lines Data Communication RS-232C Operating temperature -20ºC~+45ºC Dimension L200×H350×W180mm,5.8kg