Plantronics Savi W430 Computer Headset, Over-the-Ear / USB & VoIP Provides hands-free communications for increased productivity on PC calls, web conferencing and webinars, has Noise-canceling microphone filters out background noise, Conference in up to three additional headsets, Up to six hours talk time, Multitask, hands-free for up to 300 feet. Latest DECT 6.0 with advanced wideband audio using CAT-iq technology (Cordless Advanced Technology - Internet and Quality)