The Dalcomm Tech Model M1 lightweight headset is designed for use in professional audio and video in-truck applications. Interchangeable comm cord means versatility. Matches industry standard electrical specifications for microphone and earphone impedance's. Fully flexible microphone boom. Faux leather ear pad. For 3, 4 and 5 pin XLR adapters, use SBJ Series Cords. Portable radio, smartphone and computer adapters, use SBG Series Cords. Custom cables available. Headset travel bag, your choice of adapters, and cord clips included.