About the product
- 13 Sounds/A = 440Hz
- Often used as Western instruments. It is also convenient for taking sounds from poetry, acapella, etc
- While you ring the tune whistle, rotate the screw of the string you want to match, and adjust the sound to match both sounds
- The dragonfly whistle is carefully tuned to suit each and every use of the long production technology of reed musical instruments. Best of all, it\'s portable and easy to use when you are tuning each instrument
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