Rode MagClip GO Magnetic Adapter The third button is a

The third button is a high frequency boost

From the front

Includes all the extensions and thumbscrews required

and focus assist tools

Rode MagClip GO Magnetic Adapter The third button is aThe MagClip GO is a powerful magnetic clip that allows for total flexibility when placing the Wireless GO transmitter on talent. Simply slip the magnet under a piece of clothing opposite where you need to place the transmitter. This allows you to get the clearest recording possible no matter what kind of clothing your subject is wearing. It can even be used to place the mic discreetly on an object in a scene or on a stage to capture dialogue.