It is a very simple music instrument. You could play it without learning. It fit for all ages. And it's suitable for guitarist especially.    Description: Material:Aluminum;  Lenth:12cm;  Width:2.5cm;  Color:Gloden/Silver(color will be sent randomly);    It is a very special musical instrument, it is through the human voice humming sound, relying on its own diaphragm and resonance tube sound amplification. It may issue a hoarse tone, somewhat similar to the saxophone. As long as the player can sing songs, you can play it . You will be able to find the playing skills soon.  You do not have to learn music theory and score, not even have to practice. Just a minute you play the tone of your dreams with it. You could take it out of your pocket and add to the fun,it's very simply that many musicians and singers use it to be guest appearance. Its structure is extremely simple, the membrane can be changed (be careful when changing plugs do not get it broken).  When playing it, take the large side in the mouth, with your voice to play the tunes, vocal vibrations can drive it vibrate.    Package Included: 1 x.    Related Products: Kazoo Flute Diaphragm Ukulele Guitar Mouth Flute Harmonica