The Sescom SMARTCOM is a unique product that allows you to use your professional 4-pin XLR headset with your smartphone for voice and music applications. It's a battery powered beltpack unit featuring volume, mic adjust and a call/play/pause push button control. The Sescom SMARTCOM converts the 4-Pin XLR to a TRRS connection for smartphone interfacing while still allowing full headset functionality with your phone. The push button control handles Answer, End Call, Play/Pause Music functionality as well as Siri activation on iPhones.