This is one of those old video game reproductions that you plug straight into a TV. I gutted it after deciding I have enough versions of Pac Man to play with, (super pac man really sucks!) And built my own synth! It's another 40106 based synth using four of the six schmitt triggers for main oscillators and one for the Lfo. It has a light sensor for one of the main voices and a "rate" knob for the Lfo speed. I was able to make it run on the original set up of four AA batteries in the compartment underneath and as you can see the blue knob that I use for wintergreen altoid almost matches perfectly. It has a 1/4 inch out to plug into any amp or mixer and i used the menu light for power. The menu button works to change the LFO into a swooping triangle instead of a square wave and the red trigger button makes the sound come out.