manufacturing Miniature high definition telescope. Ratio: 8 times. : 20mm. object diameter: 20MM field angle: 5.5 degrees Kilometer horizon: 96M/1000M Exit pupil diameter: 2.5MM Exit pupil distance: 10.3MM Last focusing distance: 5M Dimensions: length 75x diameter 24mm thickness 36mm Prism system: Paul prism system. Lens: an optical lens. Function: waterproof Colour:silver Material:Metal Package Contents: 1 x Pocket Telescope 1 x Phone Holder 1 x Carry Bag(The style is random, 't accept the specified) 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.