NOCS NS300. Interface type: 3.5 mm, Cable length: 1.2 m, Cable type: Copper. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 109 dB. Number of products included: 1 pcs. Material: ABS synthetics, Copper, Thermoplastic elastomer (TPE), Volume control: Digital