... contrast ratio:4000:1 High fresh frequency CE, approved LED screen Features & Advantages: Built-in intelligence monitors LED color signature, ... year after year. 4,000:1 contrast ratio tempers screen brightness into sharp, focused images whether up close or ... signalVGA, Video, AVI, MOV, MPG, DAT, VOB etc.Protection gradeIP65 front side/IP54 backsideLED DriveConstant-current driveLifetime(hours)(50 ...