The Korg TNB-1 Tone Booster is an early-mid 1980s guitar pedal made in Japan. Control knobs: Bass - Treble - Gain - Out Level. Fully functional with no major scratches, chips or damage.
The housing is metal with a metal switcher and plastic knobs. Works perfectly with both a 9v battery or a 100mA-200mA AC Adapter. I found an old manual dated 1984.You can check it out here. This item is in the category "Musical Instruments & DJ Equipment\Guitars & Basses\Parts & Accessories\Effects Pedals\Distortion & Overdrive". The seller is "pacerpages" and is located in this country: JP.
This item can be shipped to United Kingdom.