C.A. Seydel Söhne Sampler A/D, Harmonica, Solo tuning in the keys of D and A, Three full octaves in 2 keys, can be quickly switched over or locked via the slider, Half-valving, which means that important draw notes can be ""bent down"" using the bending technique, Full sound thanks to stainless steel reeds for dynamic playing and an easy sound response, Precision milled acrylic body, Air-tight, smooth slider, With innovative locking device for the optional fixing of the slider in the pressed position, Ergonomic mouthpiece with round opening (silver plated) for lip-friendly playing, Variable slider application: When the slider is turned around, using the slider will result in a change of key (from D -> A to A -> D) - the mouthpiece must be removed.