The Comprehensive Premium 4-pole TRRS 3.5mm Mini Plug to XLR Jack Audio Adapter is a nickel finish audio adapter cable with a molded connector. It allows connecting a standard microphone with XLR connectors to an iPhone or other compatible device for quality recording. This adapter will work with battery powered microphones, unpowered dynamic microphones, and phantom powered microphones when an external phantom power supply is used. It incorporates passive components which provide impedance matching and DC blocking; allowing a wide variety of microphones to be used with the device. This adapter is the perfect solution for interfacing a phone with a quality microphone for recording or production.