Radio that's all user-interface

Here's a radically simplified user interface for a radio -- as Kottke says:
The Hidden Radio has no obvious controls...unless you count that the radio *is* the controls...it "has either no user interface...or...is all user interface". The volume is controlled by lifting the lid of the radio (which also reveals the speaker). Tuning is done by twisting the lid. Absurdly clever.
Hidden Radio (via Kottke)