FunctionsAdvanced new technology lets you control your own level of noise cancellation, Bluetooth and NFC pairing so you can connect to your devices wirelessly, Calls come in clearer, even in windy or noisy environments, with noise-rejecting dual-microphone system, Lightweight neckband design conforms to your body for all-day comfort and wear ability, Lithium-ion battery lets you enjoy up to 10 hours of wireless listening per charge.