Feature 11. Accurate design, high-quality plastic, integrated headband structure, and flexible metal microphone bracket make the microphone of this one-ear USB headset more durable and sturdy. 2 2. The ultra-lightweight USB earphones with adjustable headband to suit all head sizes. The flexible microphone bracket can meet your preferences. The soft and high-quality ear pads can be worn throughout the day for highly comfort. 3 3. With commercial grade broadband USB headphones, digital signal processing (DSP) and noise-canceling microphones, the headset can provide clear calls and acoustic impact protection (ASP) to protect your hearing. 4 4. With easy access volume and mute controls in the power cord, you can quickly adjust the volume of the headset up or down, mute or unmute the microphone or speaker. 5 5. Directly connect the headset to a USB compatible device without driver. The headset is suitable for computers, laptops, PCs, for Macs, for Microsoft Lync, for Cisco and most leading UC platforms. 6 Name: Computer Headset Plug diameter: USB Whether wireless headphones: wired headphones Speaker diameter: 40MM Frequency response range: 20-20000 Type: headphone Headset type: headset Headphone output source: PC computer Sound principle: moving coil Distortion rate: 1 Line length: 1.8M Sensitivity: 105 Headphone cable: PVC cable With or without microphone: yes Impedance: 32 ohms Plug type: in-line