Audio-Technica ATH-ANC40BT QuietPoint Active Noise-Cancelling Bluetooth Wireless In-Ear Headphones with In-Line Mic & Control Quiet Point active noise-cancelling technology reduces environmental noise by up to 90%. Connectivity Technology: Wired/Wireless Reliable Bluetooth wireless technology with in-line mic and controls for answering/ending calls, controlling music & video playback and adjusting volume on Bluetooth wireless devices 13.5 mm drivers offer a premium listening experience Connects to two Bluetooth wireless devices simultaneously; remembers up to eight devices Included 1.2 m (3.9') cable with 3.5 mm stereo mini-plug allows wired use of headphones when battery has lost charge or in Bluetooth-free zones (e.g., in airplanes or hospitals)