The pocket operator rhythm (PO-12) is a drum machine that you can totally use as a pocket sized metronome. I use is to make my warm ups more interesting than a wood block on 1234. On top of having an over powered metronome, you can make full drum tracks and even sequence them back to back continuously! This thing is so much fun to play with and Im glad some crazy person designed it.
![](https://i.ytimg.com/vi/sLXcswbQdRw/maxresdefault.jpg)