Carson TrailMaxx 8x21mm or 10x25mm Compact and Lightweight Camping, Hiking, Birding or Travel Binoculars (TM-821, TM-025) Magnification: 10x | Objective Lens Diameter: 25mm | Weight: 0.54 lbs Prism Type: BAK-7 | Multi Coated Lenses | Eye Relief: 10.5mm Field of View: 288' at 1,000 yards | Center Focusing Knob | Compact and Lightweight Included Accessories: Pouch, Strap and Lens Cloth Backed by Carson's No Fault, No Hassle Warranty