Designed for online education with the detachable microphone The large black dynamic driver wire delivering crystal-clear sounds Independent external sound card for crystal clear calls Shielded wires with large magnetic rings for less interfered online calls High-sensitivity noise cancelling microphone rotates 120 degrees for clear voice pick up Adaptable headband , pefect for almost every user to wear Exclusive stylish earcups for optimum comfort wearing volume & mute slide control 120 degree rotation lightweight headband good clarityFREQUENCY RESPONSE: 20Hz~20kHz IMPEDANCE: 32Ω SENSITIVITY : 130 MAX POWER: 50mW SOUND PRESSURE LEVEL: 102dB PLUG DIAMETER: 3.5 mm CABLE LENGTH: 2.0m WEIGHT: 0.15kg CONNECTOR: usb LINE CONTROL: Included