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Reviewing and unboxing Knops volume control earplugs
Check out Knops website:

The Knops Original is a volume button for your ears. Knops is the first ever analog hearing solution, which is adjustable in multiple settings, and uses high-quality technology. But for all the technology in this product, there are no electronics. Knops neither require batteries nor an app. Indeed, you can use them always and everywhere.
#udizisser #knops