The customer comes first! If you have any dissatisfaction with the product, we support full refund within 30 days! USB Headset Computer Headset PC Headset Headphone with Microphone Noise Headphones Feature 1.USB remote control the volume buttons and mute button, light weight design, long-term wear without fatigue 2.External volume control, supporting up to of headphone electronic volume adjustment.nThe external intelligent closed tone button is equipped with a closed tone indicator. 3.ABS materials are used to ensure the noise cancelling phone headset with durability the construction allows this headset for a long use in busy offices, telemarketing centers, customer service centers 4.The microphone can be adjusted to the desired position. 5.It is equipped with volume adjustment function, and mute function of sending and receiving Specifications Frequency range: 20Hz-20KHz Plug: USB interface Conductor length: 2.2m Headphone frequency response: 20Hz-20KHz Earphone impedance: 32 Ω Headset sensitivity: 115dB Mic impedance: 1500 Ω Mic sensitivity: - 57db Package Content: 1PC USB Earphone Viflosae Headphones for School USB Headset Computer Headset PC Headset Headphone with Microphone Noise Headphon Kids Headphones for School Deals of the Day Clearance 1.USB remote control the volume buttons and mute button, light weight design, long-term wear without fatigue 2.External volume control, supporting up to of headphone electronic volume adjustment.nThe external intelligent closed tone button is equipped with a closed tone indicator. 3.ABS materials are used to ensure the noise cancelling phone headset with durability the construction allows this headset for a long use in busy offices, telemarketing centers, customer service centers 4.The microphone can be adjusted to the desired position.