This is an AKAI SG01K GM sound module. Power-on has been confirmed. It's a half-rack sound module that is still popular as a classic GM sound source. Included accessories are the instruction manual and power adapter. Please refer to the photos for the condition. This product is no longer in production and is old, but it was kept in a rack without much use. There is some dirt, etc., and I have not performed detailed checks other than power, system startup, and sample sound playback, so please consider this before purchasing. Although normal operation should be fine, please refrain from purchasing if you are overly concerned about the condition. Thank you.