Yamaha's portable music sequencer "QY20" This palmtop music production tool, featuring a built-in sound source and sequencer in a compact body roughly the size of a VHS video tape, gained popularity. The batteries are corroded and cannot be removed. It does not work, so it is listed as junk. Only the items shown in the photos are for sale. Please understand and purchase accordingly. Packing will be as compact as possible for shipping. Please check my profile.