This bone-conduction speaker is five times more powerful than a smartphone speaker. And it’s only $26.95

TLDR: This pocket-sized disk serves up incredible audio via its bone-conduction technology, turning almost any surface into a beefy amplifier. Mobile devices like smartphones and tablets are fine when you’re plugged in with earbuds. But few of those devices are created with powerful (and prohibitively expensive) external speakers to listen easily without the use of headphones. Even at top volume, it might be enough to satisfy anyone within a 5-foot radius as a temporary listen…but it certainly doesn’t deliver any serious audio fidelity or scope. Rather than toting around big portable Bluetooth speakers to handle those types of listening situations,…

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