Pure Sine Wave 50Hz One Hour

$1.50

Pure sine wave at a frequency of 50 cycles per second for one hour. Be careful, this can be hard on speakers or headphones if the volume is too loud.

Description

Pure sine wave at a frequency of 50 cycles per second for one hour. Be careful, this can be hard on speakers or headphones if the volume is too loud. And it may not be audible at all on laptop, tablet or phone speakers.

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