https://www.youtube.com/watch?v=5bKF7qBjvR8
I gather from one commenter that they're very loud.
On Saturday, March 24, 2018 at 2:32:52 PM UTC-6, Robert Goodman wrote:
https://www.youtube.com/watch?v=5bKF7qBjvR8
I gather from one commenter that they're very loud.
Are you asking how they work or why they might be a better choice than conventional ones?
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