I don't think I'm overstating matters when I say that this may be the coolest, weirdest thing ever. It's a very rare 1990’s "Frequency" wristwatch from Seiko, with built in metronome and drum machine! The Keyborad Museum has a brief write up with more information. Best of all, it can be yours if you're high bidder (currently 155 British Pounds). Thanks to Musicthing for the link.