Product Detail Power Rocker Switch - switches on and off the AC power to theremin Audio Out - standard 1/4 in. phone jack, which delivers line level output to your amplifier Pitch Range: 5 octaves (3 above and 2 below middle C) Timbre: 2 continuous rotary controls for waveform and brightness Power Input - receptacle for the special AC adapter that comes with the Etherwave. 110 volt and 220 volt adapters are available . The "Moog Etherwave Standard Theremin - Ash Cabinet - Ash Wood Cabinet" is best product for you. We recommended Moog Etherwave Standard Theremin - Ash Cabinet - Ash Wood Cabinet