AUX, 40mm is the diameter of the headphones. 32 ohms of impedance Sensitivity at 1 kHz: 102dB, SPL Response to frequency: 20 Hz to 20,000 Hz 100 m is the maximum input power. WP The VC cord is two meters long. Type of plug: AUX On/off, cable volume control, mute, microphone drivers: neodymium high definition drivers