Commercial-grade broadband USB headsets, digital signal processing (DSP), and noise-canceling microphones can achieve clear calls and protect your hearing Ultra-light USB headset, an adjustable headband to fit all head sizes, flexible microphone arm to meet your preferences, soft and high-quality ear pads can be worn all day, high comfort The precise design, high-quality plastic, and flexible metal microphone boom make the microphone of this single-ear USB headset more durable and strong Easy to access the volume and mute controls in the power cord, you can quickly adjust the volume of the headset up/down, mute/unmute the microphone or speaker USB compatible device. The headset is suitable for computers, laptops, PCs, Macs, Microsoft Lync, Cisco, etc. Specification: Name: Computer headset Plug diameter: USB Whether wireless headset: wired headset Speaker diameter: 40mm Frequency response range: 20-20000 Distortion rate: 1 Cable length: 1.8m Sensitivity: 105 Headphone wire: PVC Microphone: yes Impedance: 32 ohm Plug type: in-line