Portable 10-300X40mm 4K Super Telephoto Zoom Monocular TelescopeProduct selling points:[Monocular Super Telephoto Lens]: The telescope's anti-shake system and special tripod 3D gyroscope make the telescope's field of view very stable when magnified several times.[Small light night vision]: Built-in night vision function allows you to use it normally at night. Activate autofocus and blur the background function, brake you can focus on observing the person or object to be observed.[Lightweight and portable]: The shell is made of titanium alloy, which has higher specific strength and weighs only 1.1 pounds. When stored, the length is only 7.87 inches and you can easily put it in a backpack or pocket when hunting, traveling or camping.[Waterproof, dustproof and shockproof design]: Nitrogen-filled O-ring and waterproof optical components can prevent moisture, dust and debris, and ensure the life-proof function.[Ideal for outdoor sports enthusiasts and nature explorers]: Portable equipment is essential equipment for bird watching, wildlife, hunting, hiking, mountaineering, camping, hiking. camping, surveillance and travel.The Objective lens diameter: 30mmMagnification: 7-17 times (corresponding to the setting level 10X100)Eyepiece diameter: 22mmExit pupil diameter: 4.2-1.7mmEye relief: 14-12 mmField of view: 230-110FT 1000YDSField of view: 4.4-2.1 degreesMinimum focus distance: 2.5mSize: 173 or 128x43mm (stretch and shrink)Weight: 300gPrism: BAK4 prismCoating: FMCBlack colorEye mask: rotating eye maskWaterproof: yesTripod can be connected: YesConnected phone: yesUsed for: racing, beach, bird watching, boating or yachting, horse racing, hunting, outdoor activities, sports, theater, travelMaterial: optical glassType: monocularThe products include:1x 10-300X40mm monocular telescope1x tripod