AM413T-Dino-Lite Pro ■Handheld Digital Microscope(USB) ■10x~50x-200x ■Buit-in 8 white LEDs ■1.3M pixels. (SXGA) ■USB2.0 ■Windows Vista, XP, 2000, or Windows Server 2003 MAC OS (Microtouch function no supported) The AM413T was designed for professional users who need sharp picture quality as well as measurement function as professional tool.The measurement capability allows the user to input the magnification rate reading from the microscope and then take measurement on line and circle.Further measurement related functions are kept been developing and the software will be able to be updated automatically through the internet without further charge.The AM413T also featured with Microtouch function, also built-in 8 LEDs, and LED on/off control capability.