The AKG K240 MKII are semi-open, circumaural headphones designed for audiophile use. They utilize patented Varimotion technology and extra-large transducers to deliver precise, detailed sound with solid low end, precise midrange, and clear highs. The headphones have a self-adjusting headband, as well as leatherette and velvet earpads for lasting comfort. A single-sided detachable cable is provided, along with a coiled cable, should that be your preference. The cables use gold-plated connectors for bolstered conductivity. Standard 3.5mm plugs provide wide compatibility, while an included 1/4" adapter allows you to connect to pro-level equipment. - Akg K240Mkii Semi Open Studio Headphones