Audio-Technica Wireless Microphone System (BP4025) Designed for broadcast and professional recording, audio-technicas BP4025 stereo condenser offers large-diaphragm capsules in an innovative coincident capsule configuration. This allows for a smaller housing while producing an x/Y stereo image with the spatial impact and realism of a live sound field. Ideal for use with professional audio and video equipment, The microphone is fully RoHS-compliant  free from all substances specified in the EU directive on the reduction of hazardous Substances (RoHS). features: large-diaphragm capsules offer pristine sound quality and exceptionally low noise innovative coincident capsule configuration produces accurate stereo image in smaller housing compact, lightweight design is ideal for camera-mount use excellent channel separation phantom power operationfor use with professional equipment switchable low-frequency roll-off and 10 dB pad includes one balanced Cable (two 3-pin XLRM-type connectors at output) RoHS-compliant  free from all substances specified in the EU directive on the reduction of hazardous Substances (RoHS) specifications: transducer: fixed-charge back plate permanently polarized condenser polar pattern: x/Y stereo frequency response: 20Hz to 17kHz dynamic range (typical): 131dB, 1kHz at max SPL signal-to-noise ratio: 80dB, 1kHz at 1PA maximum input sound level: 145dB SPL, 1kHz at 1% T.H.D., 155dB SPL, with 10 dB pad (nominal) power requirements: 11-52vdc, 7mA typical (both channels total) output Impedance: 170 ohms output Connectors: 5-pin XLR output (5-pin to dual 3-pin XLR cable supplied) switch: flat, roll-off; 10 dB pad (nominal) pad: -10dB low frequency roll-off: 80Hz, 12dB/ octave dimensions (diameter): 7.32x1. 87" (185.92x47. 49mm) Weight: 9.50oz (269.32G)