ViewSonic IFP5550-3 ViewBoard 55-inch 4K Interactive Display (IFPD55503) - Processor: ARM Cortex-A73*2 + Cortex-A53*2 1.5Hz, Resolution: UHD 3840x2160 (Pixels), Contrast Ratio: 5000:1 (DCR), Aspect Ratio: 16:9, Response Time: 8ms, Brightness: 350 nits (typ.), Memory: 3GB DDR4, Storage: 32GB, Speakers: 10W x 2 + 15W x 1, Connectivity: Input: 3 x HDMI 2.0, 1 x RGB / VGA, 1 x Audio, 1 x RS232, 1 x OPS, Output: 1 x Audio, LAN: 1 X RJ45, Type A: USB2.0: USB2.0: Front x2, Rear x1 (SmartPort™ for all), USB3.0: Front x1, Rear x3 (SmartPort™ for Rear x3), Type B: x2, for touch, Wall Mount (VESA ): 400 x 200