It is ideal for training tempo and pitch with the clarinet-like reference sound of a loud volume metronome that is easy to hear while playing. Slit for music stand mounting It is not obstructive when you read music notation by the newly designed slit which can be attached to the music stand smartly. Genuine Length 3 Degree, Short Three Degree Tuning Support A new function (M3 / m3 mode) that supports genuine harmony practice at three degrees. It is convenient for practicing up a notch. By using the pickup microphone, you can harmony training while listening to the clarinet style reference sound. Lightweight / compact / energy saving Compact and lightweight body convenient to carry. It is energy saving and economical to use with AAA battery