Feature: 1. Noise Reduction: Built in noise reduction microphone, which can clearly pick up your voice, anti static, high sensitivity, and provide you with high quality communication. 2. 330° Adjustable: The headset microphone pole can be twisted 330°, adjusted to the most comfortable position, to ensure accurate pickup of your each word. 3. Dual Plug: Equipped with a USB plug, supports volume control, provides additional PC USB options, and can also use 3.5mm jacks to connect tablets, phones and other devices. 4. Ultra Comfortable: Lightweight material and ergonomic design, protein leather ear pads, breathable and sweat absorbing, soft memory foam fits your ears, comfortable to wear all day. 5. Compatible: The headphone is widely compatible with for windows 7 8 10 xp vista, for OS X, for ios, for android, tablet computers and most devices with 3.5mm or USB audio jacks. 6. Multi Scene Application: This headset is very suitable for online courses, call centers, conference calls, webinar presentations, home work, school, children's learning, etc. Specification: Item Type: Headphone Material: ABS, Metal Wire: Headphone Cable Length: Approx. 1.9m/6.2ft, Conversion Cable Length: Approx. 1.7m/5.6ft, Total Length: Approx. 3.6m/11.8ft Headset Parameters Speaker Diameter: Approx. 28mm/1.1in Frequency Response: 20-20000 Hz Impedance: 150Ω Distortion Rate: Less Than 1% Sensitivity: 111dB±3dB/mw at 1kHz Microphone Parameters Frequency Response: 20-20000Hz Impedance: 32Ω Sensitivity: 100dB±3dB Signal to Noise Ratio: ≥-33dB Distortion Rate: Less Than 1% Range: Omnidirectional Model: XY-100B-2DU Plug: USB + 3.5mm/0.1in. Package List: 1 x Headphone1 x Conversion Line Note: 1. measurement, please allow some errors.2. Please point the microphone to your mouth to get the best call effect.