The lens uses a BAK4 prism type, making the lens more transparent, clear, and bright. Actual magnification: 10 times. Dust cover design on both the eyepiece and objective lens, can help prevent dust from entering. The wrist strap design with non-slip ropes will be easier to carry and prevent it from falling off when holding it. With a pocket design, this helps you carry and use it with one hand. The wide green film and double-sided broadband coating, making the average transmittance more than 99.5% in the spectral range of 400 to 600 nm. Specifications: Model: 40 x 60 Material: All Metal (Inner) + Rubber (Outer) Objective Lens Diameter: 50 mm / 1.96 inches Eyepiece Diameter: 20 mm / 0.78 inches Lens Coating: FMC Green Film Focusing Mode: Fixed focus Double tone Prism Material: BAK4 Prism System: Ridge System Color: Black Dimension: Approx. 160 x 50 mm / 6.3 x 1.96 inches Weight: Approx. 302 g Package included: 1 x Monocular Telescope 1 x Monocular Bag 1 x Cleaning Cloth 2 x Dust Covers 1 x Hand Rope