Number of parallel light pipes:Two

Length of lens cone of parallel light pipes: 530MM . Effective aperture: 57MM

Focal length of parallel light pipes: F=550mm

Scale of cross-hairs board: minimum: 30'', maximum: 10'

Shortest sighting distance: 2M horizontal angle.

Amplification factor: *5.7-7    resolution ratio: about 3''

Field angle: 10°20'

Adjustable range of parallel light pipes:  ≥60',

Observation sighting distance: 15- 20cm

Maximum working range of up-down working table: ≥250mm(including the aperture)

Precision of level: round bubble level at the base: △≤8'' /

Volume :1100mm long, 450mm wide, and 68mm

Weight: gross weight: 115KG, net weight: 95KG

Power voltage: :4.5～6.0V 2.1W    I=10A