Movo TCB1 3.5mm TRS (Female) Microphone to TRRS (Male) Smartphone Adapter with Headphone Jack for iPhone & Android Allows you to connect your standard TRS (3-pole) 3.5mm 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 Impedance-matched TRRS cable for mobile devices Gold-Plated Connectors 1-Year Warranty with support based in the U.S.A.