The vocoder was never supposed to be a revolution in music. Its development began a century ago, when an engineer at Bell Labs was looking for a simpler way to send phone calls across copper telephone lines.
The unit can run on three AA batteries (a set is included) or on the included USB-A to DC adapter (you'll need your own wall charger). The included instruction manual helps you make sense of what the heck all the knobs, levers, buttons, and lights mean.