Hedset PH-101H for helmets with PTT

These headphones are designed for use in the helmet FH-1. They gel ear pads and PTT integrated in the earpiece.

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
PTT on ear
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