The Phonal Invisity is proud to call itself the world’s first in-ear RF receiver. It comes with a wide range of frequencies and a remote control to adjust the volume, ensuring you won’t go deaf in the process. This nigh invisible earpiece is also equipped with enough juice to run up to 13 hours non-stop, and boasts the ability to send audio via a cellphone, walkie talkie, or a special transmitte within a 250 metre radius. Do you know anyone who could make do with one of these?