Features1Easy to Install: The monocular telescope can be installed on the eyepiece of the telescope, which is freely adjustable and easy to use. It can be connected to various types of telescopes with an aperture of 4046 mm. 2Infrared Night Vision Lamps: The digital night vision monocular uses infrared night vision lamps, which can clearly present images even at night. When using in the dark, turn on the infrared fill light. 3Digital Screen: Equipped with a digital screen, the screen is more comfortable and clearer. There are movable cross hairs on the display screen. 4Clear HD Video: The night vision monocular has night vision function for daytime and nighttime use, with an effective distance of 350 meters. 5Applicable Scenes: Telescopes are suitable for outdoor activities such as boating and yachting, traveling, hiking, camping, and animal watching.SpecificationItem Type:Night Vision DeviceProduct Material: Aluminum AlloyWeight: Approx. 543g / 19.2ozBattery Type: 18350 Lithium Battery (Shipped With Built In Battery)Battery Capacity: 900mAhOptical Lens: F1.0/6mmExternal Lens: Can Be Connected To A 40-46mm SightEyepiece: 1.5 TimesNight Vision Capability: Approx. 350m / 1148.3ftPackage List1 x Night Vision Device1 x Data Cable1 x Adapter1 x Manual2 x Washer