Deluxe Stereo Headphones - for live sound recording engineers, DJ's, Hi-Fi enthusiasts etc - Driver unit: diam.= 40 mm + actuator: diam.= 50 mm - Impedance: 32 Ohms (@1Khz) - Sensitivity(SPL): 102 dB/mW (at max.power)- Power Handling: 500 mW(max.rated) - Frequency response: 20 Hz to 20,000 Hz - Weight: 315 g (including cord) - Featuring: independent volume control (passive) + 4 meter cable w/ 3.5 mm gold plated stereo mini-plug + one 6.3 mm gold plated stereo phone plug adapter.