BAK-4 Prisms & FMC Coating: Magnification: 10x.Eyepiece diameter: 1.8cm. Objective diameter: 36mm. Multi coated optics dramatically increase light transmission for brighter images with high contrast review and high resolution, while the prisms made of BAK-4 glass will give you enhanced color fidelity. Wide field of view reveals a larger portion of the night sky, allowing you to view more of the comet's impressive tail Quick Adjustment: Center focus wheel adjusts the focus of both binocular barrels at the same time. Large focus knobs make for easy and precise focusing, and twist-up eyecups allow for quick adjustment of eye relief to obtain a full field of view. Diopter (located on right eyepiece) adjusts for differences in a user's eyes Waterproof & Fog-proof & Anti-slip Grip: Tight fitting protection can withstand the toughest weather conditions-prevents moisture, dust, and debris from getting inside the binocular telescope. Moreover, the external non-slip rubber armor is shock-resistance with firm grip.Perfect viewing whether in muggy jungle or snow land Low Light Night Vision Binoculars: Binoculars can deliver clear vision in dim condition, but not in completely darkness. Perfect for Concerts at night Ideal Gift for Parents and Kids: Great for campers, hunters, sports. also excellent for Kids Watching dolphins, Seabirds, animals,etc. Perfect hd binoculars for climbing, hiking, driving, wildlife and scenery watching etc. The binocular is also good for large stage play, vocal concert, football game watching etc SPECIFICATIONS: Magnification: 10x Ocular Lens Diameter: 18mm Objective Lens Diameter: 36mm View Angle: 8.2° Field Of View: 66/3000m (72/3280yd) Prism: BAK4 Lens Coating : FMC Lens Material: Optical Glass Body Material: Composite Size : 18 x 5.5 x 14.5cm/7” x 2.2” x 5.7” Weight : 0.68kg Applications: Outdoors, Bird Watching, Climbing, Hiking, Sightseeing, Traveling, Sports, Games, Concerts, etc. Tips for Use: 1. Don't look directly at the sun with the binoculars or you will damage your eyes. 2. Keep in a dry place when not in use. 3. Wipe the lens with a clean, dry cloth. If there are stubborn stains, use a rag moistened with alcohol so that the stains can be easily wiped away.