Though it's not clear from where the "i" comes, the website includes a demo, of sorts, that lets you extend and retract the razor at will. The unit expands to 24", and includes extra-wide, disposable blades designed to help with "tactile shaving."
Whatcha think? Inventive? I guess. Safe? Perhaps. DIYable? Don't know, but I'd start with a radio antenna, a disposable razor, and a whole heap of ducktape.