glassninja
Meet the LIBERATE 2.0 Plugfones: an earplug / earbuds hybrid wearable device that connects to your smartphone via Bluetooth and reduces noise while you listen to your favorite audio content. It comes with interchangeable foam and silicone plugs.
More items like this: here
You can use these while operating loud machines or when you need to block out noises around you to better focus. The battery lasts up to 12 hours.
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