Check the listing for details. 2pcs Infrared Touch Screen Pen Whiteboard Optical Stylus Pens, Black. Condition: New. Listed at 11.69 USD. What is this?Infrared touch screen pen is a stylus pen used for operating infrared touch screens such as projectors. Stylus pens for touch screen can be used for writing, clicking, education presentations, and other operations on the infrared touch 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 :16mm x 130mm/0.63-inch x 5-inch(D*L), 10mm/0.4-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 touch screen, used for electronic whiteboard, electronic display screen, and digital signature board.