Pocket Theremin
The Pocket Theremin has one antenna to control pitch, an on-off switch, a volume control, a mini jack output, a pitch trim control round the back for tuning, a small speaker in the front, and that's it.
Unlike the large table-top Theremins, there's no second antenna to regulate volume: run the jack output through a guitar volume pedal to do that. The principle of the Theremin is basically this: the output frequency depends on the capacitance of the air between your hand and the antenna.
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