Estimated delivery: 15–20 working days
2. Speaker: 50mm 20 ohm /20Hz-20KHz (moving coil type)
3. Output power: 20mW (1KHz 0dB)
4. Signal-to-noise ratio: greater than 110dB
5. Distortion: less than 1 percent
6. Scope of use: desktop computer/laptop, etc.
7. Working current: about 90mA
8. Input voltage: USB 5V
9. Ergonomic design, comfortable to wear
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