Built with the same acoustic signature as our award-winning Reference Series Headphones, Reference On-Ear Bluetooth Headphones add high definition aptX and AAC streaming as well as the ability to listen in passive mode using the detachable cable. Features: - Intense, detailed acoustics - 20 hour battery life - aptX and AAC high-definition Bluetooth streaming - Integrated mic with cVc - Removable Ear Cushions - Removable Flat Tangle-Resistant Cable - Folding Portable Design - Hard Shell Zip Carrying Case