jWIN's products have been engineered to ensure quality and reliability with the most modernized set of options that its customers demand. jWIN strives to be ahead of its competitors by offering the most up to date designs and features at the most affordable prices and these Digital Stereo Headphones are no exception.   Features: Fully Closed Type for Maximum Sound and Efficiency Powerful 40mm Neodymium Magnet Drivers Frequency Response: 25 to 20,000 Hz Max. Power Input: 120mW Dual-Sided Volume ControlsExtra Wide Flexible Headband 3.5mm Stereo Mini-Plug 6.3mm Stereo Adapter Plug Single-Side 10-Foot OFC Cord jWIN Limited One Year Warranty