Acquired recently (March 2010), the ECM-HW2 (T) is an excellent microphone bluetooth.Il system is indicated in the decision where the camera is its relatively remote from sujet.Je only regret that the information provided by Sony on this product (before purchase) are not very clear. Thus, the various documents do not mention that they not surround sound (recording 5.1 with ECM-HW2 (T)) is, for example, not possible with the Sony HDR-HC9 camera in my possession. (Not a word on this potential accessory in the doc of this model is as yet SONY microphone! Moreover, this microphone is very sensitive to touch and friction noise. It is therefore necessary to position the scrupulous testing before recording the spurious noise back possible.Sinon always, it is amazing at the sound quality. Recording front camera remains excellent even beyond 30 meters.