Fangrui Product Details Product Features: 1. 20x20mm Larger Objective For Brighter Images; 2. Telescopic And Adjustable Lens; 3. Metal Body For Long Life; 4. 5x Magnification For Better Visual Feelings; 5. 43-70cm Adjustable Length, Easy To Carry And Use. Product Details: Item: 5x20 Periscope Monocular Magnification: 5x Objective Diameter: 20x20mm Fov: 8.5 Degree Diopter Adjustment: +/- 5 Lens Material: Full Optical Glass Eye Cup: Fold-down Rubber Eye Cover Material: Plastic Colour: Black Package Contents: 1 X Periscope Monocular 1 X Storage Bag Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.