Specifications: Material: ABS Lens: Multilayer blue film optical glass lens Magnification: 12X Observe Distance: 3.0 meters and further Field of View: 16° Objective Lens Diameter: 18mm Distance of Exit Pupil: 2.3mm Eyespot Distance: 10mm Clamp Size: 65 * 20mm / 2.56 * 0.79in Item Size: 80 * 30mm / 3.15 * 1.18in Item Weight: 91g / 3.21oz Package Weight: 105g / 3.70oz Package Size: 8 * 5 * 3cm / 3.15 * 1.97 * 1.18in Packing List: 1 * Lens 12X zoom lens that can focus off object far or near, no dark angle and high definition. The mini auxiliary lens allows you to shoot the landscape at a distance by your phone. Universal multi-function clip type, easy to be mounted on the mobile phone, stable anti-skid. With manual fine tuning focusing system, you can rotate the focusing ring to focus and make the picture clearer. Clockwise rotation can make the distance clearer, counterclockwise can make the near clearer, easy to focus.