Full size new Aidi accordion with 41 keys on the right hand and 120 bass buttons. Supplied with plan of bass buttons to get you started right away. This is a very nice black finished accordion and absolutely brand new. There are an amazing 13 couplers on the right hand to give different tone choices (4 sets of reeds tuned LMMH) and 6 bass couplers for different bass tones. Really nice black finish on this one. Even fitted with a backpad.