Harmonica Harmonium PortableSUPER QUALITY HAND MADE, WOOD KAIL, REEDBOARD WOOD TUN WOOD, REEDBOARD TYPE VERTICAL (3 LINE), 31 2 OCTAVES, 42 KEY, 7 FOLD BELLOW, HIGH QUALITY SET OF BRASS REEDS BASS MALE FEMALE TUNING = 440 Hz Without stopper multifold bellow special heavy fitting, coupler, A440 international scale tunning harmonium. A440 pitch set of 3 "KHALSA" reeds: 1 bass + 1 male +1 Female for rich sound 3 1 2 octaves total 42 keys coupler function helps to play two octaves