The white Viewsonic PJ-PEN-003 Pen Kit is an optional interactive package designed for the PJD8653ws and PJD8353s projectors. This Kit includes 2 pens with a battery, IR camera module, and software CD. With these pens, the PJD8653ws and PJD8353s become interactive projectors that transform surfaces into interactive whiteboards. Along with the included LightPen3 software, the dual interactive pens allow 2 users to simultaneously annotate, write, or draw on the projected image. This feature encourages collaboration and engages the audience.