2x ATE-bit CPUs - oscillators creating a single squarewave output
Turbo Modem - an LFO that can tweak either CPU. selectable via toggle switch
CHP/SPW toggle - this switches the output to always on or always off
Play button - in CHP mode it will mute the output when pressed. in SPW mode it will output sound.
It's both a really cool noise maker but a very playable instrument. Plus it makes really fat bass sounds.
The BBS does not come with a power supply. It uses a negative polarity, 9VDC (not AC!) adapter.
I recommend the One-Spot: [