Enjoy beautiful music in blissful silence without the hassle of tangled cords with Denons Globe Cruiser; AH-GC20 wireless headphones with active noise cancellation. Featuring the latest Bluetooth 4.0 Dual Mode wireless technologies including Advanced Audio Coding (AAC), the AH-GC20 over-ear headphones eliminate the need for a cable, communicating wirelessly with your smartphone, tablet and portable music player. These 99% noise cancelling headphones are the ultimate audio companion. Best in class for fit and comfort paired with the ease of Bluetooth connectivity (bt class-1). Bluetooth enabling wireless listening. Noise cancelling - reducing ambient noise by an astonishing 99%. Memory foam and flake-off-free ear pads ear pieces. Adjustable headband. 40mm driver. Carry case. Batteries required 1 x Li-Ion battery . Manufacturers 2 year guarantee.