IK Multimedia iRig Mic Lav - Overview

The chainable mobile lavalier with built-in monitoring capability
for all mobile devices - http://www.ikmultimedia.com/irigmiclav/

You're a visionary videographer, an intrepid journalist, a dedicated podcaster. And when you're out in the field, you want to be able to record high-quality audio for your projects with the hands-free convenience of a lavalier microphone, and you want to do it without breaking the bank.