Connects to: PC and Mac via USB Ideal for: Users in noisy environments with PC/Mac audio communications; featuring smart sensor technology Audio performance Active Noise Canceling (ANC); Dynamic EQ: microphone frequency response 100 Hz–8kHz optimal for wideband voice telephony (up to 6,800 Hz), hi-fi stereo output from 20 Hz–20 kHz, enhanced digital signal processing (DSP), noise-canceling microphone Hearing protection: SoundGuard: Sound leveling for listening comfort and acoustic limiting for protection against sounds above 118 dBA C725 (stereo): UC Standard version built for UC applications and softphones from Avaya, Cisco, Skype and more The Blackwire 725 USB headset is great for keeping you focused in noisy office environments. Featuring Active Noise Canceling technology, a noise-canceling mic, and hi-fi stereo performance, the Blackwire 725 minimizes external noises while ensuring that PC-based calls and multimedia come through crystal clear. With the Blackwire 725, distractions go down and productivity goes up. Active Noise Canceling (ANC) technology reverses surrounding sound waves to cancel low frequency noise in order to isolate and minimize ambient noise, providing truly immersive audio that allows you to focus on what matters. Close out the noise, stay in the zone.