With rotatable darkfield stage and cordless LED illumination this advanced 7X-90X trinocular jewelry/gem stereo zoom microscope comes with a trinocular zoom head adjustable inclined-pillar stand rotatable round stage with darkfield condenser and iris 3D jewelry/gem clamp and LED illumination system with top (reflected) and bottom (transmitted) lights. The trinocular port enables to add photographic or video capability. The adjustable inclined-pillar stand ensures a comfortable observation. The rotatable darkfield condenser and the 3D gem clamp make it possible to measure gem angles. The illumination system adopts contemporary high-power LED lamps providing rich spectrum high-temperature color (though the LED light is cool) and close-to-daylight illumination. The flexible top gooseneck lamp shines light down onto objects used to observe the surface details and fine structures of jewels or gemstones. The transmitted light through the darkfield condenser is designed for the examination of the inside quality of diamonds. With the cordless LED system and the wide-voltage (90-240V) adapter/charger included for wall-power convenience this microscope is great for both on-site and in-house applications. It offers crystal clear images extremely wide zoom magnification range (13:1) and large working distance (4 ). It is an perfect instrument for gemologists jewelry dealers and collectors. Features : An advanced 7X-90X trinocular jewelry/gem microscope with rotatable darkfield stage and cordless LED illumination Large rotatable round stage with built-in darkfield condenser 3D gem clamp and graduations Adjustable inclined-pillar stand for easy and comfortable observation Possible to measure gem angles Contemporary high-power LED system providing rich spectrum high-temperature color and close-to-daylight illumination Flexible gooseneck top (reflected) light with adjustable intensity Bright white LED bottom ring lamp and powerful central light with dimmer for best darkfield illumination Cordless rechargeable power system for easy operation and portable on-site uses Wide-voltage (90V-240V) adapter/charger included for wall-power convenience Built-in darkfield condenser with iris 3D flexible gem clamp 45 degree inclined 360 degree rotatable trinocular head Trinocular port for adding photographic or video capability Extremely large zoom magnification range High resolution optics with great flatness and contrast Sharp stereo erect images over a wide field view Crystal clear original true color images Eye tube with adjustable diopter Accurate alignment ensuring a fatigue-free long time view Full optical glass elements Precise ground glass lenses All metal mechanical components Adjustable interpupillary distance Rubber eye-guards included Manufactured under restrict ISO 9001 quality control system Five (5) year manufacturer warranty for microscope Unbeatable lowest price guaranteed or the difference back! Satisfaction guaranteed or your money back! Specifications : Head: 45 degree inclined 360 degree swiveling trinocular Eyepiece: 30.5mm widefield WF10X and WF20X Objective: 0.7-4.5X Zoom Range: 13:1 Interpupillary Distance: 2-3/16 - 2-15/16 (55mm-75mm) Working Distance: 4 (100mm) Focal Range: 2-3/8 (60mm) Conjugative Distance: 13-3/4 (350mm) Stereo Angle: 12.4 degree Diopter Adjustment: +/-5dp Illumination: 3W/4.3V LED lamps Charger s Input Voltage: AC110~240V 50-60Hz