Wireless earbuds are all the rage but none are quite as compact or convenient as Xinny Lin’s concept: VOXTUBE 900B.

These super small buds pack a powerful punch but only have a footprint slightly larger than a button. Unlike other cases, this one features a built-in USB plug so you can charge everywhere from work to the car without an extra cable. Pull them out of the flip-top case and they’ll instantly turn on and pair with your mobile device. Simply drop them back in for a quick power up or plug the case in overnight to fully charge.