Check the listing for details. 2pcs Touch Infrared Screen Pen Whiteboard Optical Stylus Pens, Grey & Red. Condition: New. Listed at 14.21 USD. What is this?Touch infrared screen pen is a stylus pen used for operating infrared screens such as projectors. Stylus pens can be used for writing, clicking, education presentations, and other operations on the touch infrared screen. Whiteboard optical touch pen, usually used for teaching, conference rooms, lectures, training, business presentations, etc.What will I get?Touch infrared screen pen, is in size of :135mm/5.3 inch total length, 8mm/0.32-inch pen tips sizeIn the package of: 2pcs touch infrared screen penIs there any advantages of the product?Highly sensitive and high-precision stylus touch pen, soft, and does not harm the infrared capacitive screen, used for electronic whiteboard, electronic display screen, and digital signature board.