Fully wireless earbuds aren't connected to each other with a cable. You can wirelessly connect your earbuds to your phone or tablet via Bluetooth. The buds will then automatically connect to each other. Fully wireless in-ear earbuds always come with a charging case that wirelessly charges your earbuds. So you can charge your earbuds anytime, anywhere, and you'll never be without your favorite music again. The battery of fully wireless earbuds doesn't last as long as that of wireless earbuds, so you'll have to charge them more often.