Features a double-crosshair reticle that allows positioning of a star image either in central square or on intersection of any two lines. Three-element Kellner design of 12mm focal length. Comfortable eye relief and good sharpness. Built-in helical focuser allows sharp focusing of crosshairs. Night-vision red LED will never burn out. 1.25" barrel diameter. Brightness adjusts to desired level. Uses two SR-44 batteries. Excellent Condition. $75 or best offer. E-mail me to work-out arrangements.