For serious field recording, the optional CS-15S cardioid-type stereo microphone is a great match for the R-05 and R-09HR. For portability and convenience, the R-05/R-09HR supplies the power to the mic. Bundled with the microphone are a desktop stand, a hand-held mount, and a windscreen.
Cardioid-type stereo microphone
Battery operation is also possible when using with a recorder that doesn't supply the power