For sale is a vintage Nobels Mycro headphone guitar amp. Powered by a 9-volt battery, these are cool, portable headphone amps. Great for practicing on the go. Has clean, overdrive, and distortion modes. Features: -1/4" Instrument input -3.5mm Headphone output -Off, low, and hi switch -Normal, o-drive, and distortion modes -Belt clip -Powered by a 9volt battery