My new cell phone...

Circuit bent Fisher Price toy cell phone:

Front:

Blue button: Loop switch (there's only one loop...)

Left switch by the knob: Low pitch on/off.

Right switch by the knob: High pitch on/off.

Knob: Pitch.

"Speaker": Built in LED that blink along with the noise!

Back:

Red button: Reset.
Upper switch: Blipblip loop.
Lower switch: Distortion on/off.

Jack: Output.

Upper knob: Volume.

Lower knob: Distortion amount.

Screws: Pitch/distortion body contacts.