This is a stereo electret condenser microphone unidirectional electrostatic. It is suitable for many applications, although its shape is a problem for voice recordings (hard to find a pop filter adaptable, for example). He has an extremely low weight (32g without battery and cord), making it very useful for mobile use. The longevity of a cell 400 hours (!).
Given the quality of this microphone is still not a beast of studio ...

OVERALL OPINION

I use it for 4 months and I appreciate his extreme weight and rendering the recorded sound. Before I used a low-quality dynamic microphone, which produced an impressive breath even if it was not very sensitive. The € 60 was worth the cm-s33 when I bought it very much worth its quality for a little professional use. With experience, I would buy anyway for something more "pro" but if you have a very limited budget is the ideal