Helicopter headset PH-211

Passive Noise Reduction. Helicopter usage. Precision flex boom for perfect microphone placement. Super Soft Double Foam Head Pad. Noise-canceling Amplified Dynamic Microphone. New Comfort foam, undercut ear seals. Molded cord assembly made to exceptional pull and flex standards. Noise Reduction Rating (NRR): 24dB.

Headphone:
Headphone Type:Dynamic (50)
Frequency Response:100Hz to 8 kHz
Sensitivity:95+/-5 dB SPL (1 kHz, 1 mW input per earcup side)
full volume on ear simulator
Impedance:150 ohms (300 ohms each; wired in parallel)
Rate Input:100mW
Max. Iuput:250mW

Microphone and Amplifier:
Element Type: Noise-canceling Amplified Dynamic Microphone
Frequency Response:150Hz to kHz
Operating Voltage (supplied by aircraft ):8-32 Volts DC
Matching Impedance: 150-1000 ohms
Sensitivity:-13+/-4 dB
(ref: 0dB SPL=20.0uPa at 1 kHz with 10 Vdc 150 ohms AC load)

General:
Temperature:Operating: -20 to 70oC
Cordage:Coiled cord from headset to molded plug, 70CM
Intercom Connections:
Plug: U174/U
Weights:480g
Headset size range
Height:10 to 14 cm
Color: Black
Boom: Spring tension boom