Video-aligned optical system ensures precise positioning of components. Padded leather headband, swooped design and ergonomic controls. Illumination and visual pathways converge. Excellent visualization and true small-pupil capability. Adjusts to handle interpupillary distances of 49mm - 74mm. Soft Tilt moves optics to a stationary position out of your line of vision. Long-lasting, Bright LED light source. Vital optics and mirror assemblies are sealed against dirt/dust.