Features: [telephoto lens monocular]: The telescope's anti-shake system make the telescope's field of view very stable when magnified multiple times. [Lightweight and portable]: When stowed, the length is just 4.13 inches, and you can easily put it in a backpack or pocket when hunting, traveling or camping. [Ideal for outdoor sports enthusiasts and wilderness explorers]: Hand-held equipment is essential equipment for bird watching, hunting, hiking, mountain climbing, camping, camping, surveillance and travel. Specification: Material: abs Size: About 3.5 * 4.0 *10.5 cm/1.37x1.57x4.13inch Magnification: 10-30x30 times lens System: Roof Ridge Eyepiece diameter: 13.2mm outlet pupil distance12.5-9mm Objective lens diameter: 21mm Coating: FMC broadband coating Used for: racing, beach, bird watching, boating/yachting, horse racing, hunting, outdoor activities, sports, travel Type: Monocular Item NO.71453473