Active Noise canceling, Ear Muff headset for 2-way radio, walkie talkie

Specification

Product Model         ANC01
Headset type          Noise canceling
Wearing type            Headband
Power source          Standard AAA Alkaline battery
Current Consumption   12mA
Connection cable  Length: 1.2M
Connector socket      Standard two way radio 6-pin socket
Frequency range       20Hz ~ 18KHz
Sensitivity differential(left & right)  Less than 3dB(at 1KHz 1mw)
Close-loop voltage gain  6dB F=400Hz
Antenna isolation  45dB Po=1mW F=1KHz
S/N rate              < -95dB
Impedance             32-500 ohm (power off)
Output power          40mW    THD=10%    F = 1KHz
Total harmonic distortion  1%    F=1KHz Po=1mW
Noise reduced          24 dB    92%
Size                  200*180*83mm
Weight                373g(headset only)    513g(with PPT)

Microphone

Type  Noise Cancelling Dynamic Mic.
Case Material           ABS Plastic
Sensitivity
0°-71dB±3dB (at L=50cm)      
(0dB=1V/Pa,1KHz)
Impedance  Low impedance 150 ohm
Frequency  600Hz~12000Hz
Standard operation voltage  1V
Sensitivity reduction      Within -3dB at 1V

Boom Type  Universal Flexible and Hinged Wire
Plug Microphone&Earphone- 5P Mini Chassis XLR Connector, Male
Jack  3.5mm Phone Jack for iPod, Scanner, or other Device
NRR  Noise Reduction Rating: -23 dB
Color  HP90 Black/ HP91 Carbon Fiber
Switch:
Type  Push To Talk Button(P.T.T)
Case Material           ABS Plastic
Water Proof Cover        Silicone Rubber(Black)