Interactive Pen - Orange (marked with orange at base) is for use with BrightLink 475Wi, 480i, 485Wi, 575Wi, 585Wi, 595Wi and BrightLink Pro 1410Wi interactive projectors. It is one of two interactive pens that can be used for simultaneous use on the BrightLink 475Wi, 480i, 485Wi, 575Wi, 585Wi, 595Wi or BrightLink Pro 1410Wi. To use simultaneously, the other pen must be Interactive Pen B - Blue (marked with blue at base).