Features: 1) Achromatic objectives: 4x, 10x, 40x(s), 100x(s, oil) 2) Wide field eyepiece: WF10x, WF16x 3) Sliding binocular head: inclined at 45o, 360o rotatable 4) Inter-pupil distance: 55 - 75mm 5) Nosepiece: quadruple 6) Double layer mechanical stage: a) Size: 140 x 140mm b) Moving range: 75 x 45mm 7) Focusing: coaxial coarse and fine adjustment 8) Focusing range: 30mm; focusing interval: 0.002mm 9) Illumination condenser: condenser NA= 1.20 10) Halogen lamp, with adjustable brightness 11) Power: AC input 110 / 220V; DC output 6V Packing: Carton box or wooden case