CRYSTAL CLEAR CALLS: Business-grade Wideband Corded USB HEADSET, Digital Signal Processing (DSP) and Noise-Cancelling Mic for crystal-clear conversations, Acoustic Shock Protection(ASP) to protect your hearing. MOST COMFORT HEADSET: Ultra Lightweight USB headphones with adjustable headband to fit all head sizes, a flexible boom mic to suit your preference, soft and high quality ear cushion enhance all-day wearing comfort.