The document discusses a smart note taker pen. It can recognize handwritten notes in air and convert them to digital text. The pen has sensors to detect pen displacement and movement. It uses a processor, memory to store notes, and a communication unit to transfer notes to a computer. Notes can be written, uploaded, edited and shared. The pen works in multiple languages and has advantages like being helpful for blind users and time saving, but it is an expensive product currently only affordable to high-income users.