Feature:1. 1. Commercial-grade broadband USB headset, digital signal processing (DSP) and noise reduction microphone can achieve clear calls, and provide sound impact protection (ASP) to protect your hearing.2. 2. Ultra-light USB headset, adjustable headband to suit all sizes of headset, flexible microphone arm can meet your preferences, soft and high-quality ear cushion can be worn all day, high comfort.3. 3. Precise design, high-quality plastic, one-piece headband structure, and flexible metal microphone boom make the microphone of this single-ear USB headset more durable and sturdy.4. 4. Easy to access the volume and mute control in the power cord, you can quickly adjust the volume up/down of the headset, mute/unmute the microphone or speaker.5. 5. No driver is required, directly connect the headset to a USB compatible device. The headset is suitable for computers, laptops, PCs, compatible for os, compatible for Microsoft Lync, compatible for Cisco and the most leading UC platforms.Specification:Name: Wired USB headsetPlug diameter: USBWhether wireless headset: wired headsetSpeaker diameter: about 40mm / 1.57 inchFrequency response range: 20-20000Type: HeadphoneHeadphone type: earphoneHeadphone output source: PC computerSound principle: moving coilDistortion rate: 1Cable length: about 1.8m / 70.87inSensitivity: 105Headphone cable: PVC cableIs there a microphone?Impedance: 32 ohmPlug type: in-linePackage List:1 x wired USB headset