CablesOnline 3.5mm TRRS 4-Pole Plug to 1/4" (6.3mm) Jack Hi End/Powered Microphone to iPhone Adapter, (IP-MIC6) Connect a higher end or battery powered microphone with a 1/4" (6.3mm) plug to your iPhone/ iPad or similar device (1) 3.5mm TRRS male stereo plug (1) 1/4" (6.3mm) TS female Female jack has built-in amplifier for dynamic microphones Length: 7 inches