With the help of this special "device", you will learn a foreign language in a flash, just as only the boastful Baron Prášil could! So awaken to adventure!
Place the device to your mouth using the wider opening. To achieve the desired foreign language effect, you don't just blow air into the hole, as with a flute; it is necessary to speak or sing. The speaker thus creates the tone using his or her voice. By covering the hole with the membrane in the upper part of the product body, a change in tone colour can be achieved. All that remains is to set out on a wave of fantasy to go to foreign countries and talk to the locals! "
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