Powerful Portable 8-40x40 High Telephoto Zoom Monocular Telescope for CampingProduct selling points:[Perfect & compact & lightweight] - binoculars for bird watching. Can be used both day and night (low light level night vision, can't see anything in total darkness). These binoculars can be folded into the palm size so that they are easy to store in a pocket or bag.[Wide Field of View] - Focus on your target for brilliant detail at 1000 yards. Coated with FMC Broadband coating and premium BAK4 prism, it guarantees similar imaging. 8-24x magnification with a 22mm lens lets you see objects up close to the 12X with clarity that strikes the hearts of your birding friends[Proximity feeling] - BaK-4 roof prism and fully multilayer green film optics the best light transmittance, and it also provides good optical reflection control to create sharp and colorful images. The waterproof and ultra-durable non-slip grip gives you everything you want.[Best gift choice] - suitable for adults and children, suitable for hunting, hiking, exploring, watching, sailing, bird watching, concerts, outdoor sports etc. It is wonderful to be a gift for Father's Day and Children's Day. It is your best choice of gift.[Easy to use] The center focus dial makes it easy to adjust, even for children, while allowing the two eyepieces to calibrate separately for an even clearer view.Description:Magnification: 8-40XObjective lens diameter: 40mmEyepiece diameter: 22mmExit pupil: 4 mmEye relief: 14-12 mmField of view: 230-110FT / 1000YDSFOV: 4.4-2.1 Minimum focusing distance: 2.5 mSize: 155x50x50mmWeight: 230gPrism: BAK4 prismCoating: FMCBlack colorEye patch: Twist up Eye CupWaterproof: YesConnectable Tripod: YesPhone connection: Yes