Yamaha Pianicas are small piano-style keyboards that you power with your own breath that produce a sound similar to an accordion or harmonica. With a full 3-octave range, the P37D is perfect for experienced performers.Features:- Learning to play is very easy, since Pianicas have the same black and white keys that you will find on a piano or keyboard. Also, since they use the same music as a piano, there are many songs and music books available to choose from.- Just getting started? Our smallest model, the bright yellow P25F, has a 2 octave range which is ideal for beginners. More advanced players can expand their range with models up to a full 3 octaves, in a variety of colours and sounds.- A gentle stream of air is all it takes to make a Pianica sing - no batteries required. Stay mobile and play standing up with the fixed mouthpiece or sit down and use both hands with the flexible tube.-Do you need to take it away? All Pianica models come with a practical carrying case. Some models have a durable moulded plastic case, while others have a soft zippered case with a shoulder strap.- Durable hard plastic housing included.