The Valveless Harmonica. The new Educator 10 sports a comb design that provides a clear and powerful sound without the need for valves. Good news for players who struggle with sticking or noisy windsavers! On top of that, it's affordable price also makes it a good starter chromatic, both for novices and players making a transition from smaller diatonic models. The Educator 10 is a 10 hole 40 reed harmonica in the key of C. It comes packaged in a zippered black nylon pouch. new