The K121 MKII professional on-ear semi-open headphones are a cost-effective alternative to the K141 MK IIs for studio monitoring and playback. Designed for single-ear use, they deliver familiar sound and make intonation easy. The K121 MKII headphones feature gimbal-suspended leatherette ear cups for easy cleaning. The self-adjusting headband makes them comfortable to wear and easy to use, even in long work sessions. The K121 MKII's come with a fixed, single-sided, straight cable.