Sennheiser MKE 2 Digital Lapel Microhpone (for iPhone)
 

"The quality of the audio recording from the Sennheiser MKE 2 Digital lapel microphone is, to put it simply … superb. My voice was crystal clear with minimal background noise, even among a really noisy outdoor environment. The volume is good, so there was no need to use the gain. Once you have recorded the file, you can easily share your recordings via Dropbox (natively), AirDrop or Email."

http://www.funkykit.com/reviews/senn...el-microhpone/