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Unique Helmet Bone Conduction Headset

Item No.: PTE-129
Bone conduction core adopted,deliver clear sound,let your ears to breathe.Gas mask best partner
Description Specification

Power-Time Skull Microphone Fire-fighter Headset
Bone conductive microphone located inside the helmet.
Unique fastening strap mounts into most kinds of helmets,  perfect for fire fighters, Gas mask wearers etc.


Advantages
* The superiority of reducing full-spectrum noises
* Great speech intelligibility
* Comfortable fit
* Fire-proof cable and headset, strong and durable.


Construction:
a. Kevlar reinforced PU cable, more sturdy which is  cold and heat resistant.
b. 1 speaker  type and 2 speakers type for choice
c. Clear voice picked up from the skull,
d. Nexus 4 pole connector,match with Power-Time IP67 D type PTT as well as most popular PTT adapters
1.Speaker Specification
Type Transducer Moving coil dynamic speaker
Impedance 32±15% Ω AT 1KHZ
Sensitivity 99dB±3%/40mW on a 6CC Coupler
Resonance Frequency 4KHZ±20%
Frequency respond 600 Hz~ 4 KHz
Rated input power 1mW (Normal)
Maximum input power 0.5W
 
2.Microphone Specification
Type Pickup MIC
Sensitivity Range -31 ± 3dB RL=2.2K Ω Vs=2.0V(DC)
1KHz 0dB=1V/Pa
Output Impedance   2.2KΩ 1kHz
Frequency respond 300-5KHz
Current Consumption Max 0.5uA (at RL=2.2KΩ Vs=2.0V(DC))
Max Sound pressure Level 115dB S.P.L( at 1K Hz THD<10%)