Wireless Headphones - with microphone, headset, around the ears, closed construction, Bluetooth 5.0, supports AAC and aptX, active noise control (ANC), taking calls, battery life of up to 34 hr(s) Enjoy listening to your favourite music without cables. The KOSS BT/740iQZ, Black wireless headphones are sure to impress with their comfortable design. Their ear-covering design ensures amazing insulation against surrounding noise. These KOSS BT/740iQZ, Black Wireless Headphones are made with Bluetooth technology for wireless connection to your devices. Say goodbye to tangled cables. These wireless headphones are also equipped with a built-in microphone. These wireless headphones from Koss are made with 5.0 Bluetooth technology. Thanks to active noise cancellation, nothing will disturb you while playing or working. This model can even pick up your calls. A fully charged battery will be able to last 34 hr(s). KOSS BT/740iQZ, Black Wireless Headphones Key Features...