Meet GoTouch: a portable gadget with a sensor and smart pen that turns any projector or TV interactive. You will be able to write on PDF files, presentations, videos, and everything in between. The sensor detects infrared light in the pen tip and transmits info to your PC, tablet, or smartphone via Bluetooth.
The device works with iOS and Android. It lets you invite others to your screen for collaboration. It is compatible with any screen up to 100 inches.