Connects To: Simply and easily connects to PC or Mac via USB-A to mobile/tablet via 3.5 mm connector. 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 & Wearing Style: 2 years global warranty; over the head wearing style with two earpieces.