Specifications:Micro high-definition telescope.Ratio: 8 times. Caliber: 20mm.Object diameter: 20MMField of view angle: 5.5 degreesKilometer Horizon: 96M/1000MExit pupil diameter: 2.5mmExit pupil distance: 10.3MMLast focusing distance: 5MSize: length 75 x diameter 24mm, thickness 36mmLens: An optical lens.Function: WaterproofPackaging included:A1 x 8x20 monocular telescope1 cleaning cloth1 x sling+storage bagB1 x 8x20 monocular telescope1 cleaning cloth1 x sling+storage bag1 phone holder