Features:telephoto lens monocular: The telescopes anti-shake system make the telescopes 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: absSize: About 3.5 * 4.0 *10.5 cm/1.37x1.57x4.13inchMagnification: 10-30x30 timeslens System: Roof RidgeEyepiece diameter: 13.2mmoutlet pupil distance12.5-9mmObjective lens diameter: 21mmCoating: FMC broadband coatingUsed for: racing, beach, bird watching, boating/yachting, horse racing, hunting, outdoor activities, sports, travelType: Monocular