... Brightness ( 1.3M )Brightness ControlManual adjustment , Auto W/B by softwareMagnification Ratio25 X ~ 300X ( Manual )Power SupplyUSB Port ( 5V DC )InterfaceUSB 2 ... Chinese, German, Italy, Spain, Portugal Russia,Japan,KoreaSystem RequirementPentium Computer with 700M Hz & Above , 20M HD Space CD ROM Driver, 64MB ... USB cable, CD disk,Metal Fix Stand, color box, simple user manual USB Digital Microscope