Microphone:
Pattern: electret
Directional: noise cancelling (NC)
Impedance: 4400 Ω
Sensitivity: -44 dB V / Pa, 1 kHz
Frequency: 300 Hz – 9 kHz

Speaker:
Pattern: magnetic
Impedance: 250 Ω at 1 mW / 1 kHz
Sound pressure level: max. 117 dB
Frequency: 100 Hz – 4 kHz

Send button (PTT-8):
Housing: impact resistant plastic housing, black, with cloth clip
Life cycle PTT: min. 1.500.000 cycles

Additional data:
Temperature range: -30°C to +70°C
Weight: 118 g (incl. PTT button)
Level of protection: EEx ib IIC T4