Headphone Amplifier:
1. Impedance: about 16ohm
2. Output power (RMS): 125mW
3. THD: about 0.5%
4. Frequency response: 20Hz-20kHz
5. Signal to noise ratio: about 85dB
packing list:
Microphone x 1
Support rod x 1
Table stand base x 1
Micro-USB to USB cable x 1
Information guide x 1