A Livescribe smartpen is about the size and weight of a large pen (5/8" x 6 1/8"), and is equipped with a removable ball-point ink cartridge, a microphone to record audio, a speaker for playback, a small OLED display, an infra-red camera, and internal flash memory that captures handwritten notes, audio and drawings.The user can choose to record audio in addition to the handwritten text. Recorded audio is kept indexed with the handwritten text—tapping on a written word starts playback of the recorded audio from that part of the recording.The smartpen allows the installation of as many applications as there is memory, and ships with several applications. If tapped on the correct images, it can function as a calculator, for example, or can translate words (the translator software as shipped includes only 21 words in a small selection of languages - as of September 2010 there are no public plans to make a full version of this translator available