SMK Corp, the same company which showcased the no-battery remote control at TEXPO 2008, also presented the first pen which lets users write on air quite literally. To be able to work its magic, the pen has an integrated triaxial acceleration sensor. This sensor is responsible for detecting spatial motion and recognizing the characters written. The characters are transmitted onto the screen via Bluetooth connection. The pen can reportedly still function for up to 10 meters away from the screen, although I assume the transmission time would be slower.

While the company claims the Wireless Input Pen is the first pen to allow users to write on what is virtually nothing, other companies have developed similar devices before, although all seem to require the presence of paper for the pens to write on rather than just air. The company is currently applying for a patent of the device, envisaging the Wireless Input Pen to be used as a better substitute for laser pointers during presentation.