Surface Tempered Glass High grade metal enamel shell, black and silver frame Materials Aluminum profile frame, a cold rolled sheet Size 32'', 43'', 49'', 55'', 65'' Resolution 1920*1080 Brightness 400cd/m2(Typ.) Viewing Angle 89/89/89/89 Contrast Ratio 1200:1 Color Depth 16.7M Scanning Frequency 60Hz Backlight Type WLED Configuration System Android RAM 2GB+ROM 8GB Interface Built-in speaker,Support Ethernet、Wi-Fi、RS-232、MIPI、RJ45、USB etc. Loudspeaker 8W*2 Power Supply Input Power AC 110-240V, 50/60HZ Work Environment Work Temperature 0℃—45℃ Work Humidity 20%-80%RH Store Humidity 10%-75%RH