These are "those harmonicas with the button on the side" as a lot of people say. The "button" activates a slide that gives you sharps and flats, so that theoretically you can play any tune in any key. This becomes a matter of learning scales and getting familiar with the button/slide in-out patterns.
Play diatonic scales in any key with one harmonica. Hohner's precision-crafted reeds generate great tone to complement your chops. The 270/48 Chromonica has 12 holes, 48 reeds, 5-5/8" long. Comes in base keys (starting note) of A, B, Bb, C, D, E, F, and G.
Hohner 270/48 Chromonica Features:
48 precision-crafted reeds
12 holes
5-5/8" long
This is a great one to start playing chromatic harmonica with - it has one octave less than the "64" models and so is lighter and more compact, plus it just plain sounds great. In old photos of Stevie Wonder you can see him playing this model of harmonica
The 12-hole chromatic Hohner #7539 Hard Bopper Chromatic Harmonica was designed and constructed to specifications provided by harmonica legend Toots Thielemans. Toots recommends the Hard Bopper's thicker reedplate for blues or rock. The Hard Bopper harmonica's reed design permits the articulate, fast runs demanded by jazz. The Hohner #7539 Hard Bopper harp features a pearwood comb and chromeplating on both covers and mouthpiece.
Hohner 7584 Super 64X Chromatic Harmonica, Key of C The Hohner 7584 Harmonica's plexiglass body with gold-plated slide assembly and double-thick reedplates provide the player with excellent dynamics and reed response. Special Super 64X design and construction helps to ensure optimum tuning and airflow balance.
Unique in style and sound with a molded one-piece housing for a warm, round tone.
The award-winning CX-12 is the newest addition to Hohner's chromatic line. A revolutionary design feature a back-mounted spring plate eliminates the need for mouthpiece and cover screws. The result is an optimal slide action and compression improvement with quicker response, greater volume, and maximum airtightness. Service and cleaning are also a snap the CX-12's 4 major parts can be disassembled in seconds without any tools!
Curved ends conform more comfortably to the player's hand. Slightly oversized holes with finely tuned reeds and wind-saving value, moisture-proof synthetic body and nickel plated cover. 2 chromatic octaves, 8 holes and 32 reeds. Key of C.