Guyatone MOm5 Micro Octaver This is the discontinued Guyatone MOm5 Micro Octaver. I bought it several decades ago and used it for home recording. It's an analog octaver that can mix the original sound, one octave down, and two octaves down for output. I used it for home recording and didn't take it to studios or live performances, so I mostly kept it in its box. Therefore, there are not many scratches or stains, but it is still a used item. Operation has been confirmed with a 9V adapter.