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Panel L-J1900 Panel size: 55inch Resolution: 1920*1080P Aspect ratio: 16:9 Response time(ms):6.5ms Contrast Ration: 4000:1 Brightness:350cd/m2 Viewing Angel: 178°/178°(H/V) Features Anti-glare glass 10 point infrared touch Multiple touch on Windows/Mac Speaker: 2*10 W Built-in Android (4.42) Interface System 2 x VGA In, 4 x HDMI in, 1 x Audio in, 1 x WAN , 1 x YPBPR in, 1 x AV in, 1 x AV out, 1 x Earphone out, 1 x Spdif out, 2 x USB2.0, 2 x USB3.0, 2 x Touch out, 2*15 W Speaker OSD Language Chinese, English, Spanish, Russian, German, French, etc. Environment Operating Temperature :0°C to 38°C Operating Humidity: 10%-95% Storage Temperature :0°C to 40°C Storage Humidity:10%-95% Power Consumption 240W Power Supply AC 110V~240V,50/60HZ\ Accessories Included 3M HDMI*1, 1 Specification, 1 Remote Control, 2 Draft Pen, 1 Guarantee Card