Affordable quality binoculars with a magnification of 8X and objective lens diameter of 21 mm (millimeter). Precise roof prism optical system and fully coated optics to reduce glare and transmit plenty of light. Easy center-focusing system with right-eye diopter adjustment. Rubber armoring to protect from shock and keep them quiet. Fold-fown eyecups for eyeglass wearers. Carrying pouch and neck strap are included. Comes with a limited lifetime manufacturer warranty. A very good use for sports, travel, and outdoor activity. Blue lens coating.