2. The frosted design allows the user to grasp the binoculars more stably, just turn the center dial to focus easily, 1. Product size: (mm)148X130X53, exit pupil di: 17 (mm), exit pupil diameter: 3.7 (mm), eyepiece diameter (mm): 24.5, objective lens diameter (mm): 42, 4. The binoculars are protected by a shock-proof design to provide better lens protection when dropped. 3. Specially designed to protect eyes and face, even after hours of bird watching or wildlife discovery, it can provide comfort, This binocular also can be used for watching large stage play, vocal concert, a football game, etc.