Telescope
Image                               erect
Length of  tube                    156mm
Size of Object Lenz             45mm
Magnification                      30×
Field of View                      1°30＇
Resolving Power                 3.5＂
Shortest Sighting Distance        1.3m
Stadia Multiplication               100
Addition Constant                  0

Angel Measurement　　
Method                     Photoelectric Incremental
Min reading                   1＂/5＂optional
Accuracy                            2＂            

Auto compensator
System                     Tilt Sensor   
Accuracy                    ±3＇ 

Level sensitivity
Tubular level                30＂/2mm
Circular level                8＇/2mm

Optical Plummet
Image                        erect
Magnification              3×
Adjust range               0.5m～∞
Field of View                  5°
Accuracy               ±1mm

Date Output
Interface                    RS-232C

Physical Feature
Temperature                 -20°C～+45°C
Battery                        AA/chargeable
Voltage                            DC3V
Continuous Measure Time      20 hours
Weight                             4.8kg