Ade Advanced Optics 4x10mm Ultra Compact Binocular for Opera/Concert Portable compact design 4x binoculars. Dimentions:3.9 x 2.3 x 75 inches Fold-down Eye cups and 13mm Eye relief accommodate glasses. Package weight: 6 oz Thinnest binocular, large field of view for indoor playing going such as concert Field of view is 525 feet. Eye relief is 13mm Comes with lens cloth and carry case with neck strap backed by Ade's life time warranty. Ade is an Oregon company