About this item XLR TO TRRS SPLITTER: Connect your standard female XLR microphone connector to your 4-pole TRRS smartphone. QUALITY CRAFTSMANSHIP: Gold-plated, impedance-matched connector ensures clear playback with zero interference on smartphone. MONITOR YOUR AUDIO: Keep an ear on your microphone recording with a compatible headphone monitoring app on your smartphone. BATTERY-FREE ADAPTER: This compact unit does not have a battery box to power a XLR microphone that requires it. (e.g. some condenser microphones) Dimensions: 4.6 x 4.3 x 0.5 inches.