The high refractive index BAK4 prism offers bright, clear images and contrast that allows you to capture all the details of the object. Full multiple coating (FMC): Multiple lenses with a full anti-reflection coating for excellent light and brightness transmission while improving contrast and resolution. Adjustable eye width and double : Due to the large number of eye widths, they are suitable for both adults and children. Simply use the central wheel and diopter adjustment ring to bring your targets into. And the binoculars can pull down the rubber eyepieces and fit glasses wearers. Best Gift Choices: Suitable for Adults and Children, Suitable for Hunting, Hiking, Exploring, Watching, Sailing, Bird Watching, Concert, Outdoor Sports, etc. It is wonderful to be a gift on Father’s Day and Children’s Day. It is your best gift choice. Magnification: 30X-260X Objective lens diameter: 80MM Eyepiece diameter: 15MM Objective lens material: optical glass Body material: metal shell Close distance: 10M Prism system: BAK4. Due to the different monitor and light effect, the actual color maybe a slight different from the picture color. Please allow 1-2cm differs due to manual measurement. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.