Type: Open air, dynamic/ Bluetooth Headphone / Driver unit: 40 mm diameter, dome type/ power handling capacity: 50 mW / Impedance : 32 ohms ata 1kHz / Sensitivity: 108 dB/mW / Frequency response: 12- 22kHz / Cord: 2.2m with stereo mini plug /Mass: Approx. 125 g without Cord / Supplied accessories: Earpads (2)