This manual provides instructions for operating and maintaining a 50mm tactical binocular featuring a ranging reticle. It describes the binocular's components and controls like the adjustable eyecups, interpupillary distance adjustment, center focus wheel, diopter ring, and reticle focus. The manual explains how to properly focus the binocular and use the ranging reticle to calculate distances by matching the reticle to objects of known size or using the included silhouettes. It also provides care instructions and details the lifetime warranty.