The AKG K 240 MK II is a semi-open, over-ear studio headphones. It features a circumaural design that provides comfortable fit and excellent sound isolation. The dynamic headphones have a frequency range of 15Hz to 25kHz and a nominal impedance of 55 ohms. They are equipped with a self-adjusting headband for a secure and personalized fit. The headphones also have a detachable cable for convenience and come with a 3 meter straight cable and a 5 meter coiled cable. The AKG K 240 MK II is widely used by professionals in recording studios and is known for its accurate sound reproduction and spacious soundstage.