https://www.techdirt.com/articles/20210125/09551446114/daily-deal-blade-bone-conduction-speaker.shtml

Blade is the world's thinnest bone conduction speaker. Using bone conduction technology, this speaker turns sound into a mechanic vibration of different frequencies, leveraging the effects of the different materials on top of which it is placed and used. It delivers a high sound volume, being 4 to 5 times louder than the average cell phone speakers' volume. Put Blade on top of anything and experience a DIY customizable experience of sound. It's on sale for $28.95 and is available is grey, silver, or cyan.

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