audio technica / BP4029

It is 236mm long and features a newly developed, independent, high-sensitivity microphone unit with unidirectional and bidirectional characteristics.

■Stereo Condenser Microphone
■Back Electret Condenser Type
■Superdirectional + Bidirectional
■Switchable LR-Wide, LR-Narrow
■Frequency Response: 40Hz-20kHz
■Sensitivity: Mid -30dB, Side -34dB, LR Stereo -36dB
■Maximum SPL: Mid 123dB S.P.L., Side 127dB S.P.L., LR Stereo 126dB S.P.L.
■Signal-to-Noise Ratio: Mid 72dB, Side 68dB, LR Stereo 70dB
■Output Impedance: 200Ω
■Power Supply: Phantom Power (DC11-52V), 4mA Low-cut: 80Hz, 12dB/octave
Size and weight: Diameter 21mm, Length 236mm, 103g
Accessories: Microphone holder AT8405a, windscreen, adapter screw, 0.6m microphone cable, two O-rings, carrying case

From the manufacturer's website:
- Equipped with a newly developed, high-sensitivity microphone unit with independent cardioid and bidirectional polar patterns. Three selectable modes—MS Direct, LR Wide, and LR Narrow—enable it to capture target sounds in noisy environments, or to capture stereo base and ambience in indoor and outdoor sports recordings.

- Overall length 236mm, weight 103g. Lightweight, compact, and easy to handle, the rugged aluminum construction ensures it can withstand harsh environments such as on-camera or boom-mounted for outdoor recording.

- A special acoustic tube with a high-precision slit design and a transformerless circuit provide stable phase response and a wide dynamic range. - Comes standard with an 80Hz, 12dB/octave low-cut switch that effectively reduces wind noise.

- Strengthened RF protection against radio waves from mobile phones and wireless intercoms. Reduces noise and eliminates problems in poor working environments.