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 headset Plug diameter: USB Whether wireless headset: wired headset Speaker diameter: about 40mm / 1.57 inch Frequency response range: 20-20000 Type: Headphone Headphone type: earphone Headphone output source: PC computer Sound principle: moving coil Distortion rate: 1 Cable length: about 1.8m / 70.87in Sensitivity: 105 Headphone cable: PVC cable Is there a microphone? Impedance: 32 ohm Plug type: in-line Package List: 1 x wired USB headset