The VE-B20 is ideal for higher education and advanced research. It allows two users to view the sample at the same time. Suitable for routine techniques in clinical laboratories such as cellular differential count in Neubauerfts chamber, coproparasitoscopic examinations, urinary sediment observation and bacteriology samples. The VE-B20 also offers the optional configuration to be compatible with a phase contrast kit and polarization set Product Specifications: EYEPIECES: WF 10X/22mm with rubber eyecups and diopter adjustment on both eyepiece. HEAD: Double binocular Siedentopf type, 45° inclined and 360° rotation, with interpupillary distance adjustment between 48 in 75 mm / 1.88in – 2.95in. NOSEPIECE: Quadruple nosepiece with anti-slip grip and click-stops. OBJECTIVES: 4X, 10X, 40X (S) and 100X (S) (oil), infinity corrected achromatic optics, metallic finish and color ring for easy identification. STAND: Stative, robust and reinforced with epoxy paint finish. STAGE: Two-Layer stage with X-Y coaxial movement, 180 x 150 mm/7.08in x 5.90in, vernier, millimeter scale, clamp and height adjustment with stop. CONDENSER: Abbe, 1.25 de N.A. with height adjustment screw. Equipped with adapter for phase contrast kit and polarization set (not included). DIAPHRAGM: Iris with filter holder. FOCUSING: Coarse and fine anti-slip control knob with tension adjustment. ILLUMINATION: Kohler LED with intensity control and field diaphragm in the lamp. POWER SUPPLY: Three 1.2V AA rechargeable batteries (included) for 4 hours of continuous operation. 110-240V, 50/60 Hz AC adapter. DIMENSIONS: 9.13in³ x 17.12in³ x 14.68in³ Accessories included: Power cord. Dust cover. Blue, green and yellow filters. Immersion oil Accessories not included: Phase contrast kit. Polarization set.