Meet the HumBird: a clever bone conduction device that can turn any hollow surface into a speaker. It comes with Bluetooth 5.0 and can be used as a pair to deliver a surround sound experience. You can try the HumBird on different surfaces to get different sounds.
The device measures only 40mm in diameter, weighing 35 grams. It is small enough to fit in your pocket, so you can take it anywhere. The HumBird can deliver a sound volume of up to 115dB.[where to get it]