The Dalcomm Tech Model K1 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, 200 ohm dynamic mic, 300 ohm earphone. Compatible with RTS, Clear-Com, Riedel, HME, Telex, Studio Technology, 100's of portable radios, smartphones, tablets, laptops and more. Fully flexible, 270° Rotatable Microphone Boom.. Faux leather ear pad. Compatible with SBJ Series adapters. Custom cables available. Headset travel bag, one adapter, and cord clip included.