Legendary sound brought to a new standard: Enjoy comfort, freedom, and the best sound around with Acid eye. Bluetooth 4.1 enables wireless connectivity, legendary Acid eye Pro Audio Sound provides a dynamic listening experience, and sculpted ear cushions allow for unprecedented fit, and comfort around your ears. With a rechargeable battery offering 25 hours of performance and best music, videos and games, now you can dance alone or with a partner free from limits. A built-in microphone also allows for easy call access. Features: Bluetooth 4.1: Connect to any Bluetooth-enabled device for amazing sound quality without the hassle of wires. Legendary Acid eye Pro Audio Sound: Enjoy the same elevated experience and incredible sound Acid eye has been delivering to concert halls, studios and living rooms for years. Best-in-class Ergonomics: These headphones are ergonomically designed to fit the unique contour of your ears. You'll experience unprecedented comfort. Listen longer and enjoy it more. listen your music, videos and games - easily and wirelessly. Built-in Microphone: Enjoy more natural sounding voice calls with a built-in microphone with echo cancellation technology.