The LG CreateBoard TR3DK-B Series 55″ 4K UHD Whiteboard Monitor can simultaneously use up to 40 points of IR multi-touch input. This function offers a lifelike board writing experience and makes collaboration easier. Plus, get clear imaging with 390 nits of brightness and a 1200:1 static contrast ratio. Interfaces include HDMI, VGA, 3.5mm analog audio, RS232C control, RJ45 Gigabit Ethernet, USB-A 3.0 and 2.0, and USB-C 3.0 with power delivery and DisplayPort Alt Mode.