Movo TCB2 XLR (Female) Microphone to TRRS (Male) Smartphone Adapter with Headphone Jack for iPhone & Android Allows you to connect your standard XLR (female) microphone connector to your TRRS (4-pole) smartphone Adds a Headphone Monitoring Input (Optional). To use this feature, you must use an app that allows "headphone monitoring" while using a microphone This compact unit does not have a battery box to power a XLR microphone that requires it. (e.g. some condenser microphones) Impedance-matched TRRS cable for mobile devices 1-Year Warranty with support based in the U.S.A.