Amazon.com: ASIILOVI Bluetooth Speakers Module, Bluetooth Pillow Speaker with Mic, DIY Bluetooth Headset, Bluetooth V5.0 Replacement Module for Sleep Headphones, Bluetooth Beanie, Bluetooth Headband : Electronics
Apple's patent shows headphones that turn into speakers | Daily Mail Online
Valve's VR headphones started life as two speakers taped to a skate helmet | Engadget
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