The Moog EWSTD019 Etherwave Theremin is one of the only instruments you can play without physical contact. The Theremin is one of the oldest electronic instruments. It is played by using the heterodyne principle to generate an audio signal & waving your hands around the two antennas is how you control pitch and volume. The loop antenna controls the volume while the straight antenna controls the pitch. Though not well known by name, you've probably heard it used in sci-fi movies like "The Day the Earth Stood Still" and "The Thing from Another World". Theremins produce very ghost-like, operatic sounds. The Moog Etherwave Theremin is a quality instrument, designed to be rugged & extremely portable. Boasting a 5-octave pitch range & spacing between notes, this theremin is a fun instrument to experiment with. The antennas are nickel-plated 3/8" brass tube & the cabinets are furniture-grade hardwood ash with custom Moog stain. Complete with adapter for mounting on a standard microphone stand & works fabulously when paired with Moog's TB-15 instrument amplifier.