Display size: 20 inch Aspect Ratio: 4:3 Response Time: 8ms Max. Resolution: 1280?024 Ideal Resolution: 640?80 Contrast Ratio: 500:1 Brightness (cd/m2): 400cd/m2 Viewing Angle: 165?165?H/V) Audio Speaker: 3WX2 OSD language: Optional Horizontally Scan Frequency: 24 ~ 80KHz Vertically Scan Frequency: 55~75Hz Voltage/Frequency: AC Input 90~264V, 50-60Hz Power Consumption: <60W Display Mode: VGA, AV, TV Security Authentication: CCC, FCC, CE Gross weight: 9kg Net weight: 6.6kg Natural Life: >50,000 hours