The all-new CS200i communication headset headphones are perfect for at the office, language learning programs, or taking internet conference calls. Koss CS200i communication headset headphones full range of sound brings conversations to life. Featuring the unique Koss D-Profile earcup design, the CS200i fits the shape of the ear for the perfect fit. The flexible, hands-free electret noise-cancelling boom microphone with detailed sensitivity and reduced sound distortion is perfect for multi-taskers. The Koss CS200i communication headset headphones connect to devices through a single 3.5mm (TRRS) plug for analog headphone and microphone audio.