There is nothing like recording a video scene only to realize afterwards that the sound is muffled and tinny. This is normally the case when using the cameras internal microphone. Using an external microphone drastically improved the quality of my recordings.
This review is on the Teyeleec Mic-01 Stereo Shotgun Microphone. This microphone is a very cheap costing alternative to the more expensive ones, yet it is still a quality performing mic. It features a stereo mic which can be configured to pick up 90 or 120 degrees of sound, depending on what and where the sound source is.
The mic is powered by a single CR2 3V battery, which in my opinion isn’t such a great idea as they are not commonly found in most stores, but they are easily available online. I would suggest buying a rechargeable CR2 battery.
Protruding from the back of the mic is a 3.5mm cable which plugs in securely to my Canon camera. The quality of the mic is pretty impressive for such a cheap product, and it is sensitive enough to pick up ambient noise as well. There is a status LED that blinks when powered on to indicate that it is working properly, and it will also blink during use to indicate a low battery. The mic attaches securely to the hotshoe mount of my camera with a thumbscrew.
I received this item in exchange for my honest and unbiased review, and I think it is a quality mic for the price.
This mic can be found on Amazon right here: http://amzn.to/1QPEXqL