Over-ear headphones. Features: QuietPoint active noise-cancelling technology powered by a proprietary four-microphone multi-feedback system greatly reduces environmental noise. Bluetooth wireless technology with touch and swipe controls built into the earcup for answering/ending calls, controlling music & video playback and adjusting volume on connected devices. Foldable design makes headphones ideal for travel. On a full charge, internal battery provides up to 25 hours of continuous use of Bluetooth wireless and noise-cancelling technology, and up to 1,000 hours on standby. Included 1.2 m cable with 3.5 mm stereo mini-plug, 30 cm USB charging cable and a protective pouch. Specs: Driver Diameter: 40 mm. Frequency Response: 5 – 40,000 Hz. Sensitivity: max. 98 dB/mW. Impedance: max. 150 Ohms. Weight: 250 g. Colour: Black.