BOSS OS-2 effects pedal. Includes a nearly unused battery. Patch cable and AC adapter are for testing the power lamp. They are not included with the product. Thank you for viewing. This pedal mixes overdrive and distortion effects. Personally, it was my favorite distortion pedal. Effect output has been confirmed. Power has been confirmed with both battery and AC adapter. However, this is a used item from a previous era, so please understand that it cannot be compared to a new product. Please ask any questions in the comments before purchasing. Thank you.