Hohner 3100FB Panther Diatonic Button Accordion in F key accordion Bundle with Accordion Gig Bag Compact, lightweight diatonic button accordion. Plays in the keys of F, Bb, and Eb Accordion parts features 31 treble keys, 12 bass/chord buttons, two sets of treble reeds and double strap brackets Hohner's Panther 3100FB accordion is offered in the F, Bb and Eb key combination with a sleek matte black finish with accordion case. Easy to play with 31 treble keys and 12 bass/chord buttons. Sounds great played solo or in a group Accordion music, accordion case, play accordion, Diatonic Button Accordion, accordion piano