Heh.. When I first got a summer computer programming job during my University studies (30+ years ago now), I had to buy an alarm clock. So I got a cute little white cube thing with a big LED time display and AM/FM radio built in. It measures about 5-6" on each side.

Still have it, still using it. I did have to open it up and replace all the capacitors last year, to get rid of the ever louder AC hum it developed.

Probably not very power efficient though -- need to measure the current draw sometime soon.

Cheers