BOSS CE-2 Chorus. Pedal only. I have tested the sound/operation with a BOSS ACA adapter and a 9V battery. There were no problems with the knob operations, footswitch, jacks, etc. There are scratches and dirt commensurate with its age, so please check the photos. Please understand that this is a used item. ● We do not offer discounts, exclusive listings, or holds. ● Please understand that this is a casual inspection. ● Please note that we may reuse packing materials. ● Please understand that this is a used item and we ask for no claims and no returns. Thank you very much.