manweidianzi Monocular Telescope 4K 10_30X25mm High Power HD Monocular for Bird Watching Waterproof Telescope Made by BAK4 Prism and Eco_Friendly Materials _B_

Description:     Objective lens diameter: 30mm     Magnification: 7-17 times (corresponding to adjustment level 10X100)     Eyepiece diameter: 22mm     Exit pupil diameter: 4.2-1.7mm     Eye relief: 14-12mm     Field of view: 230-110FT 1000YDS     Field of view: 4.4-2.1 degrees     Minimum focusing distance: 2.5m     Size: 173/128x43mm (stretching and shrinking)     Weight: 160g/240     Prism: BAK4 prism     Coating: FMC     Colour: Black     Eye mask: rotating eye mask     Waterproof: yes     Tripod can be connected: Yes     Connected phone: yes     Used for: racing, beach, bird watching, boating/yachting, horse racing, hunting, outdoor activities, sports, theater, travel     Material: optical glass     Type: Monocular Products include:     1x 10-30X25mm telescope monocular     1 monocular telescope     1 storage bag     1 rope     1 piece of cloth     1 tripod     1 clip