Description: Lens diameter: 30 mm. Magnification: 7-17x (according to the setting level 10 x 100). Eyepiece diameter: 22 mm. Exit pupil diameter: 4.2 - 1.7 mm. Eye relief: 14-12 mm. Field of view: 230-110FT 1000YDS Field of view: 4.4-2.1 degrees Minimum focusing di: 2.5m Size: 173/128 x 43 mm (stretching and shrinking). Weight: 300g Prism: BAK4 prism Coating: Colour: black. Eye : rotating eye . Waterproof: yes. Tripod can be connected: Yes Connected phone: yes. Used for: racing, beach, bird watching, boating/sailing, horse racing, hunting, outdoor activities, sports, theatre, travel Material: optical glass. Type: Monocular Includes: 1 x 10-300 x 40 mm telescope monocular 1 x phone holder.