Ear Muff headset with Noise reduction for F1 racing track

Noise canceling Ear Muff headset designed for F1 racing field

SPECs:

1.  Earphone:
Size  Outer Diameter 50mm
Weight  14.8 gram
Magnet  Materials Ferrite Size Φ20.5*4.5mm
Impedance  300 At around 1KHz
Power Rating Normal 30mW RMS Maximum 50mW
Output Sound Pressure level 83±3dB /100mW /1cm  With Artificial ear per channel
Average at 1.0K, 1.2K, 1.5K, 2.0KHz
Resonance Fo           100Hz
Frequency Range         100Hz~3000Hz
Distortion  5% Maximum at 1KHz /100mW /1cm
Abnormal Sound Test Must be Normal Tested by 3.0Voltage Sine Wave
Load test 30mW RMS  White noise for 48hrs

2.  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  
Frequency  600Hz~12000Hz
Standard operation voltage  1V
Sensitivity reduction      Within -3dB at 1V

3.  Boom Type  Universal Flexible and Hinged Wire
4.  Plug  Microphone&Earphone- 5P Mini Chassis XLR Connector, Male
5.  Jack  3.5mm Phone Jack for iPod, Scanner, or other Device
6.  Colour  HP90 Black/ HP91 Carbon Fiber
7.  Switch Type  Push To Talk Button(P.T.T)

Case Material           ABS Plastic
Water Proof Cover        Silicone Rubber(Black)