【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. This harmonica has a range one octave lower than a 21-hole double-note harmonica. Add it to an ensemble for a rich performance with a spacious bass range! It features a deep, heavy tremolo tone. If you add one to your ensemble, it will instantly transform your performance with rich bass and depth! Of course, you can enjoy a wide range of performances, including solos, not just for the low range. Although it's the same size as a regular double-note harmonica, you'll fall in love with the thick, extended tremolo tone that comes from it. There are two types of tones: C and C♯.