... memorySourceFour LED,adjustable led light, USB poweredFocusAuto focus+Manual focusDetection range Infinity Maximum size lens diameter 17mm*length ... 30 Ching/secInterface USB 2.0 interfacePakage size 185mm*125mm*70mmStandard accessoriesUSB cable, manual,CD-ROM, TripodSales service7 days ... 200X digital microscope with USB 2.0 interface,1/10-200 zoom freely adjustable, auto and manual focus, lab equipment