This is a BOSS OD-2 TURBO OverDrive. Based on the serial number, it was manufactured in January 1986, and it appears to be a Japanese-made unit that requires an "ACA" type AC adapter. This is a through-hole component unit, not a surface-mount unit like those made in recent years. There are signs of use, including scratches, paint剥がれ (peeling), and discoloration of the paint. * There is some crackling in the control pots other than the TURBO switch, but the unit functions without issue once set. * The LED has been changed to green. Stored in a smoke-free, pet-free environment. Please check the condition in the photos. No accessories are included. This is a listing for the main unit only. * Batteries are not included. Please refrain from purchasing if you do not understand that this is a used item, inspected by an amateur, and stored by an amateur. Also, returns are not accepted after purchase for any reason, so please read the description carefully and consider your purchase thoroughly.