Description: Clear Sound: Built-in noise reduction microphone picks-up your voice loud and clear, also the flexible microphone boom ensures accurate talking position for every word. Adjustable: Super lightweight computer headset with adjustable headband to fit all head sizes. Simple Audio Control: Easy to access volume and mute controls in the cord, you can quickly adjust the headset volume up/down, mute/un-mute the microphone or speaker. Application: Great choice for Online courses, Skype chat, call center, conference calls, webinar presentations and more. Usage: Perfect for those who take a high volume of calls each day, such as call center staff, office workers, customer service users, phone job staff etc. Plug And Play: The USB headphone is plug and play, no software installation is required. Specification: Material: ABS+PVC cable Model: 900, 440 Color: 900: black; 440: black+green Cable length(approx): 2m/78.74inch Interface: USB Speaker diameter: 30mm Diaphragm: 32 ohm Frequency response: 20-100KHz Whether to bring a microphone: Yes Usage: head-mounted Package: 1 pc x wired headset Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.?Usage?Perfect for those who take a high volume of calls each day, such as call center staff, office workers, customer service users, phone job staff etc. ?Application?Great choice for Online courses, Skype chat, call center, conference calls, webinar presentations and more. ?Simple Audio Control?Easy to access volume and mute controls in the cord, you can quickly adjust the headset volume up/down, mute/un-mute the microphone or speaker. ?Plug And Play & Adjustable?The USB headphone is plug and play, no software installation is required. Super lightweight computer headset with adjustable headband to fit all head sizes. ?Noise Canceling Mic?Built-in noise reduction microphone picks-up your voice loud and clear, also the flexible microphone boom ensures accurate talking position for every word.