Headphone
Type: Closed-back
Driver: 40mm diameter, neodymium magnet, copper-clad aluminum wire voice coil
Frequency Response: 40Hz v- 20kHz
Microphone
Element: Dynamic
Polar Pattern: Hyper-cardioid
Frequency Response: 300Hz - 20kHz
Sensitivity
Microphone Open Circuit Sensitivity: -61dB ±3.5dB (0dB=1V/1Pa, at 1kHz , typical)
Headphone Sensitivity
CC-300: 102dB ±3dB (SPL) /1mW at 1kHz typical)
CC-400: 98dB ±3dB (SPL) /1mW at 1kHz typical)