: You can fine-tune the pitch by twisting the outer cap and collar to open or close air holes.
Reviewers and long-time users often prefer this mechanical design over digital alternatives for its consistent, non-looping sound. User Experiences “Mine has been running nightly since 1973.” Reddit · r/BuyItForLife · 5 years ago
“I love that it's air that creates the sound and not digital Audio recorded sounds. Makes a HUGE difference for my autistic son.” Carewell - Medical Supply Store to newer like the Yogasleep Rohm Go to product viewer dialog for this item.
: Known for extreme durability, with many users reporting units lasting over 20–30 years. Expert and Community Insights
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