High-quality stereo headphones, which reduce outside noise levels by 20 decibels. Offering superb stereo sound, these wireless headphones provide a full and tight low end, clean midrange and clear high end. The 500mA built-in rechargeable battery provides approximately 20 hours of use. These headphones connect wirelessly to enabled devices, and include a 3.5mm cable and 1/4" adapter for optional wired usage.