This expansion microphone is your guarantee of always being heard, even in the largest meeting rooms! Compatible with the Poly Studio USB, X50, X52 and X70 models, this accessory offers 360° sound coverage for homogeneous diffusion throughout the room. Supplied with a 7.6 metre RJ11 cable, in addition to amplifying the sound of your video system, it allows you to mute the sound instantly thanks to the built-in mute button. Plug & Play, all you have to do to use it is switch it on!