MAIN OVERVIEW FEATURES: Connectivity Technology: WiredSound Mode: StereoImpedance: 32 OhmMinimum Frequency Response: 20 HzMaximum Frequency Response: 22 kHzConnector Plating: Silver PlatedEarpiece Design: Over-the-earDriver Size: 1.18"Host Interface: Mini-phoneColor: BlackEnvironmentally Friendly: YesCountry of Origin: China