JVC HA-S31M-B. Product type: Headphone, Wearing style: Ear cup, Recommended usage: Calls / Music. Connectivity technology: Wired, Contact plating: Gold. Earphone design: Supra-aural, Headphone frequency: 10 - 26000 Hz, Impedance: 32 Ω. Microphone type: In-line. Weight: 140 g