These QuietPoint active noise-cancelling headphones feature a four-microphone multi-feedback system to reduce environmental noise. Bluetooth wireless technology with touch and swipe controls on the earcup to handle phone calls, volume and music playback from devices. 40 mm drivers; memory-foam earpads; foldable design. Includes 1.2 m (3.9') cable for wired connection, 30 cm (1') USB charging cable and carrying case.