?Viewing head: 45?inclined, 360?rotatable binocular head ; The inter-pupillary distance adjustable between 55-75mm;diopter adjustment of range ?mm. ?Eyepiece: Wide field, high-eyepoint eyepice, It can observe image of observation specimen with glasses. ?Objective: Turret objective 2X/4X, 1X/2X and 1X/3X for option ?Magnification range: between 5X-160X. ?Working distrance: 100mm, special maximum working distance can provide more working space for you. ?Illumination: Built-in and built-out illumination system. ?Focusing: Two focusing knobs also used for tension adjustment, slide range 49mm. ?Accessories: There are many accessories to choose.