Tremolo Tuning, 26 keys, range B-C, 2 treble registers, 48 bass buttons, 4 voices, keyboard length 12.75 Inch</br>Includes adjustable textile straps.</br>Gig bag.</br>Incredible Value</br></br>Product Description</br></br>The Bravo piano accordion series features rugged and musically versatile instrument offering performance features formerly exclusive to more expensive instruments.</br><br/>http://www.amazon.com/gp/product/B00DS602EM