The accessible Hohner HA-3100 Panther GCF diatonic accordion shares many of the quality features of Hohner's step-up diatonics with a lower price tag, including 31 treble keys, 12 bass/chord buttons and two sets of treble reeds. It plays in G, C and F. The Hohner HA-3100 accordion is 12" x 7-1/2" and weighs 9 lb.