These posters are like, purely a showcase of technical skills....I like it!
Too cryptic, potential customers do not see the whole pen. So the assumption is... a large 'magic' doodleboard, but product says 'MyPEN', with pen in capital letters. So... not enough information...Lacks contact information (e.g. website, FB page). Instead of a series or set of 3 images, it ads did not fully show the features of the pen. As Chang Han suggested, the ad space could have been divided into 3 (per poster ad) and each panel could show how the pen records / stores the user's writing movements and then downloads it as a file. To confirm my comments: Ask friends / relatives / family about the series of 3 ads what it is trying to sell (without revealing the answer until later).