Four Microphones and a Proprietary DSP Work Together to Cancel Disruptive Background Noise like Traffic or Crowds Six Layers of Unique WindSmart Technology Detect Wind Direction and Respond Accordingly MultiPoint Technology Allows Connection to 2 Devices while A2DP Allows for Music Streaming, Driving Directions, Podcasts and More Bluetooth Version 4.1 Provides Extended Mobile Range of Up to 98 feet and a Dedicated Button Activates Siri, Google Now, or Cortana Supports HD Voice over wideband networks and devices to enhance speech quality, so your caller clearly hears and understands you.