Shure AONIC 50 BR, Bluetooth Headphones, Frequency range: 20 - 22,000 Hz, Sensitivity: 97.5 dB / mW, Impedance: 39 Ohm, 50 mm dynamic driver, Adjustable noise cancellation, Battery life up to 20 hours, Range up to 10 metres, Analogue 3.5 mm jack connection for wired use, USB-C port for charging, Fingertip control for pause/play, volume adjustment and accepting calls, Sound adjustable via ShurePlus PLAY app (free download for iOS and Android), Weight: 334 g, Colour: Brown, Includes transport case, 3.5 mm jack cable and USB-C charging cable