The AKG K 240 Monitor is a classic semi-open over-ear studio headphone designed for professional monitoring and mixing applications. It features a self-adjusting headband for a secure and comfortable fit, along with circumaural ear pads for improved low-end performance. The headphones utilize a Varimotion diaphragm for enhanced sensitivity and wide dynamic range, resulting in detailed and accurate sound reproduction. They also come with a detachable cable and a 3.5mm to 6.3mm screw-on adapter. The AKG K 240 Monitor headphones have a frequency range of 15 Hz - 25 kHz and an impedance of 55 ohms.