... by fingers, fist work as eraser;ð Module design, simple combination, installation and parts exchange after sale actively.ð Aluminum ... pens, geometric figures, compass, magnifying glass, cover, record, etc. Record, Multi Pens Choice & Other Function Dynamic Digital Sketchpad, ... pen styles. With spotlight, camera, amplify glass, mask, record, save, playback, print, email, etc. 8). Certificates Have ...