The Plantronics Voyager 5200 WindSmart Noise Cancelling Bluetooth Headset offers reliable call clarity especially outdoors as well as cutting edge, adaptive noise canceling. With six layers of WindSmart technology, this headset eliminates disruptive background noise like wind and chatter to make voices sound clear, indoors and out. A rigorously tested, ergonomic design ensures all-day comfort, from the first call of the day to the last. Its 2-in-1 red button easily activates Siri, Google Now or Cortana. Whispered alerts update users on talk time and even announce the names of incoming callers so they can simply say "Answer" or "Ignore" to calls without lifting a finger. It features a smart sensor that automatically detects whether or not it's being worn, directing call audio where users expect to hear it. This headset has a sweatproof nano-coating that protects it against sweat and water splashes (IPX4).