This accessory is essential if you want to film differently! Example with the camera around his head (viewpoint located at eye level without risking shoot the shadow of the camera on the head!) But be inventive by setting the camera to the end, for example, a monopod and and to film in unusual corners or even inaccessible (eg. at ground or into a river!). Believe me there are many possibilities but know that there is also a version with housing (REF. Sony BLT-HB1) to completely release them two microphones on the front (the sound is considerably mitigated by the waterproof case) .