ITEM NAME:Mini 10-30x25 HD Day Optical Outdoor Travel Monocular Telescope Description: 127ï ¼Ë†Maximum stretch length 200mm/ 7.9"ï ¼â€°x 33 x 33mm/ 5 x 1.3 x 1.3 inches Power: 10-30x25 Lens Material: bak9 Eye lens diameter: 12mm Objective lens diameter: 25mm Magnification: 10x to 30x, free adjustable. Vision angle: 10x: 3.5 degree, 30x: 2 degree Exit Pupil Distance : 12.4 - 8.4mm Multiple FMC-Green Coated Focus system: twist and pull Package Includes: 1 Piece Monocular 1 Piece Carry Bag 1 Piece Instructions SKU: ALU0016061754016713.1 Piece Monocular. Focus system: twist and pull. Vision angle: 10x: 3.5 degree, 30x: 2 degree. 1 Piece Carry Bag. 1 Piece Instructions. SKU: ALU0016061754016713. Magnification: 10x to 30x, free adjustable.