3.5MM Wired Microphone Headset Studio Conference Guide Speech Speaker Headphone

brand new and high quality 　

Feature:
Powerful and clear sound in unique design.
Use this for a video conference.
Superior clarity for voice. Notice:
The Micphone cannot connect with Computer or for smart phone directly .It have to connect with loudspeaker for Using !!!
This is for Head Wear Type Micphone ,for Head Mounted Micphone .
Only Micphone !!!
Not with earphone ! Please be attention !!! How to use:
a directional microphone, make sure the microphone above two holes (sponge to the next can be seen) with the mouth,
the most suitable distance away from the mouth microphone is 10-15MM
the microphone plug into the corresponding receptacle on the host computer (not into the audio input jack hole)
in order to achieve the best results, it is recommended to use microphone
try to avoid multiple spots microphone plug, side cause poor contact
Specification:
Microphone core size: Φ9.7 * 5.0mm
Sensitivity: - 52db ± 2db
Direction:One-way
Output impedance: ≤ 680Ω
Operating voltage :1.0V-10V
Frequency Range: 20-22kHz
SNR: ＞55db
Connector size:3.5mm
Wire length:100cm/39''(approx)
Material:Plastic
Color:Black
Quantity: 1 set
Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!