Earphone Type: Dynamic

Microphone Type: Electret, noise cancelling

Nominal Earphone Impedance: 200 Ohms each

Coiled Cord: 5.5 feet long, extends to 9.5 feet

RECEIVE CHARACTERISTICS:
Imput Impedence: 600 Ohms nominal

Frequency Response: 400 Hz to 4 KHz ± 3 dB

Adjustable Gain: 30 dB Max

THD: <2%

TRANSMIT CHARACTERISTICS:
Output Impedance: 100 Ohms

Frequency Response: 400 Hz to 4 KHz ± 3 dB

Adjustable Gain: 40 dB max

THD: <2%

OPERATING VOLTAGE:
TH-45 & TH50: 9 V DC, 30 mA max from AC adapter