Camera Pen and Dot Sample – These interactive whiteboards Have a very microscopic dot pattern embedded during the crafting floor. A wi-fi digital pen is made up of an infrared camera that reads the dot pattern to find out the precise place about the board. : 1 man or woman https://yealink-meetingboard24689.goabroadblog.com/33263853/the-best-side-of-yealink-meeting-board-86