Viewsonic IFP7550-E1 - 75" ViewBoard 4K Ultra HD Interactive Flat Panel Bundle - 75" LCD - ARM Cortex A53 1.20 GHz - 2 GB - Infrared (IrDA) - Touchscreen - 16:9 Aspect Ratio - 3840 x 2160 - LED - 350 Nit - 1,200:1 Contrast Ratio - 2160p - USB - HDMI - VGA - Android 5.1 Lollipop: