The Movo TCB2 is a Microphone for home, studio, and location use. Connect your standard female Xlr microphone connector to your 4-pole Trrs smartphone. Gold-plated, impedance-matched connector ensures clear playback with zero interference on smartphone. Keep an ear on your microphone recording with a compatible headphone monitoring app on your smartphone. This compact unit does not have a battery box to power a Xlr microphone that requires it. (e.g. some condenser microphones).