Features: Provide high definition image of observation specimen . Upright binocular head Diopter adjustment of range f+5mm. The inter-pupillary distance adjustable between 55-75mm. Slide-in objective. Built-illumination system as 230V/10W (12V/10W tungsten bulb)(CE and GS approved )or 115V/10W(12V/10W tungsten bulb ) If you equipped gem clamp and dark filed with 2L type stand ,then it can be used as a jewelry microscope. 42cmX35cmX52cm