Supereyes B010-S 2.0MP 1 ~ 300X Handheld Easy Control USB Digital Microscope Loupe Magnifier with LED and Stand - Silver Microscope diameter is 19 mm, length is 125 mm. All Supereyes microscopes are protected by strong, light, skinny and environmental friendly aluminum alloy body. Snap shot and video recording functions. Photo format: JPEG. Max Photo Capture Resolution: 1600 X 1200. Max Video Capture Resolution: 1600 X 1200. Video format: WMV for Windows systems, AVI for Mac OS. Maximum display speed 30f/s. Compatible with Windows 8/7/Vista/XP SP2/2000 32/64 bit, Mac OS &amp;times; 10.5 or above, Linux. For Mac, please simply use Photo Booth or FaceTime to open the device, no driver or additional software needed. Measurement function is only available on Windows systems., including length, arc, rectangle, distance measurement and etc. is only available on Windows based operating systems. Powered by 2.0 USB. Real 2.0M pixel CMOS sensor. Adjustable LED light. Auto white balance and auto brightness balance. Magnification: 1 ~ 300X (combined optical and digital zoom, 300X is calculated on 21