Size 75" Aspect Ratio 16:9 Resolution 3840(H)x2160(V) Back Light Unit DLED Response Time (typ.) 8ms Refreshing Frequency 60Hz Display Color 1.07B(10bit) NTSC% 75% Brightness with Glass (typ) 400 cd/m2 Brightness with Glass (min) 350 cd/m2 Contrast Ratio (typ.) 4000:1 Contrast Ratio (DC = on) support DC Viewing Angle 178° Life Time 50000 Hours Ambient light sensor Support Motion sensor Support Pen holder Yes Video/Audio Speaker Type Built-in Speaker Mic array 8 Array, Pickup Distance：0-8M Camera intégré Built-In Camera 1080P 1300W Display Connectors Front HDMI IN 2.0 1 USB3.0 2, Public TYPE-C （15W） 1 (15W) USB Touch 1 Rear HDMI IN 2.0 2 DP IN 1.2 1 VGA 1 USB 2.0 1 USB 3.0 1 SPDIF OPTICAL*1 RS232 1 LAN(RJ45) 2 (10/100M) USB Touch 1 LINE OUT 1 MIC IN 1 AUDIO IN 1 Network 10/100Mbps OPS 1 80PIN Touch System Sensing Type IR System Android 11 Touch Point 20 points touch windows 20 points Android Touch Tool Finger, Passive pen,Opaque objects Writing Point 5Points Response Time