AKG Pro Audio K141 MKII Professional On-Ear Semi-Open Studio Headphones On-ear, semi-open design for solid base and airy highs Optimized for single-ear use keeps the familiar sound and makes intonation easier Patented Varimotion 30mm XXL transducer for accurate signal transfer and great dynamic range Leatherette and velvet ear pads for maximum wearing comfort Self-adjusting headband for optimum fit and ease of use