The Sharp PN-L851H AQUOS BOARD interactive display system is made for show and tell in the digital age. Equipped with a 85" Class (84 9/16" diagonal) screen, you get pristine 4K Ultra-HD resolution. With a pre-installed controller and built-in whiteboard and wireless functionality, it is always ready for a quick meeting. The touchscreen supports up to 20 touch points at a time. You can use either a finger or the bundled touch pen, which gives a Pen-on-Paper® writing experience. Your group collaborations just got more seamless and intuitive.