Zeo's earpiece

"Get it out of me!"

"What?"

"Get the earpiece out! She's gone rampant!"

Zeo telling Krystal to pull his earpiece out when Cortana turned rampant.

The earpiece was made by Carlisle Cullen before the Cullens Betreyal. Modified by Zeo, his was embedded in his ear, accidentally linked directly to his brain, much like a BAHA. When Cortana went rampant, the earpiece sent electronic shock to Zeo's brain. When the earpiece was removed, however, Zeo realized he was deaf. The earpice was hooked to the temporal lobe of his brain, supplying the sound waves a way to get to his brain anyway. When Cortana was removed, Zeo reconstructed his earpiece, having a link to both ears, replacing Cortana with an YuMEE he had.