ViewSonic VB-PEN-004 Active Stylus Pen for Select ViewBoard ModelsViewSonic VB PEN 004 Active Dual Head Digitizer Stylus Maximize the instructional return and annotation fluidness of your collaborative learning environment with the hardware integrated precision of the ViewSonic VB PEN 004 Active Stylus. Specifically engineered to interface natively with advanced digitized display architectures, this high performance active pen acts as a high density utility conduit for district trainers, corporate presenters, and