Connects To: Simply and easily connects to PC or Mac. Ideal For: Users transitioning to a PC for telephony, webinars, conference calls, and other applications. Audio Performance: Clear, natural and rich audio with wideband audio - a noise-canceling microphone - along with enhanced digital signal processing (DSP). SoundGuard: Acoustic limiting for protection against sounds above 118 dBA. Intelligent Features: A lightweight metal headband offers durability and a comfortable custom fit. Global Warranty and Wearing Style: 2 years global warranty; over the head wearing style with one earpiece.