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Features Designed for professional use - call center & online meetings Offers clear conversations thanks to its Environmental Noise Cancelling microphone In-line function keys for volume & mute mic Wide compatibility due to Quick Disconnect connectivity Technical data Connectivity: QD ( Quick Disconnect ) Technology: Monaural, wired Driver size: Φ28mm Impedance: 150 Ohm Frequency: 150Hz - 10MHz Sensitivity: 123±3dB Headset cable length: 60cm Adapter included: QD to USB with Environmental Noise Cancellation USB adapter cable length: 160cm Microphone impedance: 2.2k Ohm Microphone SNR: >58dB Microphone sensitivity: -40±3dB Compatibility: Devices with USB port Volume control: Yes Microphone mute button: Yes Color: Black Total cable length: 220cm Working condition temperature: -10°C ~ +40°C Working condition humidity: 10% ～ 95% Package dimensions: 260 x 166 x 45mm Package includes: Voice 510N Wired Headset QD to USB adaptor Protective bag