... , 0°C ~ 40°C,Humidity:45%RH ~ 85RH%.Brightness Control Manual adjustment Magnification Range 50X ~ 500X (Manually)Power Supply USB Port ... Requirement: Pentium Computer with 700M Hz & above,20M HD Space CD ROM Driver, 64MB RAM, Direct X VGA CardCD disk Driver ... cable 3. Metal fixed Stand (1pcs)4. CD ROM (Driver, Measurement software, User Manual)software system requirements Windows 2000,XP,VISTA,WIN7 ...