This is a professional DV stereo 3.5mm microphone fitting for household DV.

Features:
The 3.5mm microphone can be fixed on the DV with microphone hold and path.
Delivering a stereo sound image with superb clarity.
The pick up pattern (affecting the sound stage width) can be set to 90 or 120 according to the sound source.
It is delicate and portable.

Specifications:
Frequency response: 30~18000Hz
Sensitivity: -40dB (0dB=1V/pA at 1KHz)
Direction: Uni-direction
Output Impedance: 200ohm
S/N Ratio: 76dB (1KHz at 1Pa)
Max SPL, 120dB (at 1KHz <= 1% T.H.D)
Power Requirement: DC 3V
Model: MS (Mid-Side) Stereo System
Power Requirement: CR2 3V Li battery (not included)
Mode of sound pick-up: 90° or 120°, 2 kinds for your switch