A4Tech
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A4tech HS-9 Stereo Headphone
- Brand: A4tech
- Model: HS-9
- Omnidirectional Noise-cancelling Mic
- Frequency: 20 Hz - 20 KHz
- Sensitivity: 100 Db
- Cable Length: 180 cm
A4tech HS19 3.5mm ComfortFit Stereo Headset
- Brand: A4tech
- Model: HS-19
- Omnidirectional Noise-cancelling Mic
- Frequency: 20 Hz -20 kHz
- Sensitivity: 102 dB
- Cable Length: 2 M
A4tech HS30 3.5mm Headphone
- Brand: A4tech
- Model: HS30
- Omnidirectional Noise-cancelling Mic
- Frequency range: 20 Hz-20 kHz
- Impedance: 32 Ohm
- Sensitivity: 102 dB