Auto Refractometer (6000A)

1. Measure Range:Spherical: 0 to + / - 20D (0.12D step).Cylinder: 0 to + / - 8D (0.12D step).Axis: 0 to 180 angle (1 angle step).2. Pupil Distance: 45 - 85mm, 1mm step.3. Vertex Distance: 0mm, 12mm, 13.75mm.4. Min.Pupil Size: 2.2mm.5. Chart: auto fog.6. Display: 5'' CRT Monitor.7. Print: Thermal Printer.8. Power Supply: 100 - 120V / 200 - 240V, 50 / 60Hz product offered by Nanjing Opt Optical Machinery Co., Ltd.