Used 【AER】 Twin Channel Acoustic Amplifier BINGO (as is). Output and sound quality changes have been confirmed for both channels 1 and 2, as well as reverb and delay. (Regarding sound quality, we have not performed precise measurements using measuring instruments, etc.) Sound was produced, but subjectively, the sound seemed slightly quieter and with less sound pressure, but I think it's a sufficient level for indoor playing. Other detailed function checks have not been performed, so please purchase with the understanding that this is an as-is item. There are minor scratches and some dirt on the body, but there is no critical damage. Sound was produced, but since it cannot be compared to the same model, please consider it as junk. All items in the images are included. (A general-purpose AC cord will be included.) ● Weight: 7.3kg ● Size: 265mm(H) x 330mm(W) x 235mm(D) We will ship quickly using recycled cardboard and air-packing. Thank you. Please purchase with the understanding that this is a junk item.