IR-1 Infrared Pen use TSAL6400 led with 940nm specs, pressure sensitive tip switch, supporting WII or IR ... interactive whiteboard Product DescriptionIr pens us Vishay TSAL6400 led with 850/940nm specs, pressure sensitive tip switch, supporting WII ... stabilizing resistance prevents over usage of LED power consumption, greatly prolongs the life of IR LED*LED protective cover is made of hard ...