AT H-200 Military HeadsetSupplies of the equipment stopped Microphone TA-121/PT Type : Electro Magnetic Sensitivity : More than 18dB(1Khz) Impedance : 600 ohm +- 60 ohm (1Khz) Frequency Range : 0.3 ~ 4KHz Termination : Contact Ring Weight : 59.5g Dimensions(inch) : 51.0 pie x 20 Ambient Temperature : -20°C ~ 60°C Humidity : Max 95% RH FSN : 5965-341-9312 Earphone TA-118/PT Type : Electro Magnetic Sensitivity : More than 94dB(1Khz) Impedance : 600 ohm +- 60 ohm (1Khz) Frequency Range : 0.3 ~ 4KHz Termination : Contact Ring Weight : 57.5g Dimensions(inch) : 51.0 pie x 18 Ambient Temperature : -20°C ~ 60°C Humidity : Max 95% RH FSN : 5965-341-9311