The discontinued BOSS ACA-100G AC adapter converts AC100V to DC9V and provides an output of 200mA. This item has been stored at home. Although it hasn't been used for a long time, I have confirmed it powers on with an OD-1. Since it is an old item, please refrain from canceling your purchase after you buy it. - Model: ACA-100G - Input Voltage: AC100V 50-60Hz 5VA - Output Voltage: DC9V 200mA - Brand: BOSS - Country of Manufacture: Japan This is a genuine AC adapter exclusively for BOSS vintage effectors, which is now discontinued. It is an essential item for operating "ACA specification" BOSS compact effectors from the 80s to the mid-90s at their original potential (LED brightness and sound stability). It is recommended for those who own models (OD-1, SD-1, DS-1, CS-2, etc.) that do not operate properly with the current PSA adapter due to insufficient voltage. Thank you for viewing.