Instant and constant focus for immediate usage. The Night Owl Explorer Fixed Focus Binoculars feature premium performance in an attractive rubberized finish for robust extra fortable handling. These binoculars have two Electronic Intensifier Tubes (EIT) for extra clarity and viewing pleasure cradled inside Night Owl Optics unique Steel Stringer System for precision and control. These binoculars also feature our built-in infrared illuminator which provides clear and bright viewing in plete darkness. Instant constant clear focus Two electronic intensifier (EIT) inside steel stringer system for precision and control. Powerful bulit-in infrared illuminator provides clear and bright viewing in plete darkness. High quality all glass optics for both objective and ocular lenses Rubberized finish protects against rugged use while providing fortable handling