BLUETOOTH 3.0 HEADSET: Signature Plantronics audio technology and enhanced voice clarity through Bluetooth 3.0 and wideband audio support. compatible with bluetooth 4.0 headsets SMART SENSOR TECHNOLOGY: Our technology senses when the headset is being worn so it can automatically answer calls as you place the headset on your ear or redirect audio to your phone when you set down your headset. VOICE RECOGNITION: Manage calls hands free without pressing buttons through Plantronics voice recognition technology, just say Answer or Ignore.Operating storage temp : 32 degree F to 104 degree F (0 to 40 degree C) NOISE CANCELLING TECHNOLOGY: Our triple mic technology cancels background noise and wind and can separate your voice from 80 dB's of background noise. Charge connector : Proprietary snap-fit magnetic connection WATER RESISTANT: P2i nano-coating technology will protect this Bluetooth headset from rain, sweat, and coffee spills so you can wear the headset in the office or at the gym. Please Note: Kindly refer the User manual and the Guide before use. Plantronics Voyager Legend is the newest headset in the Voyager family to deliver unsurpassed audio clarity and all‐day comfort. Combining triple‐mics that cancel noise and wind, voice commands, and Smart Sensor technology, Voyager Legend understands how and when you want to talk. Sensors react when you put the headset on, letting you quickly take a call without a click. If you’re already wearing it, Voyager Legend announces who’s calling and waits for you to say "answer" or "ignore." Simply tap the voice command button and ask to check battery level, connection status, and more. With technology this nimble, Legend is the first truly intelligent Bluetooth headset.For any further queries please contact Plantronics's @ 1 855 765 7878 and http://www.plantronics.com/us/support/index.jsp.