QKZ DM9 3.5mm Wired Earphone with High-Quality Mic: Key Features:Brand Name: QKZModel Number: DM9Style: In-earCommunication: WiredConnectors: 3.5mmUse: Mobile PhoneFunction: Microphone, Noise CancellingColor: SilverVocalism Principle: DynamicFrequency Response Range: 20Hz - 22,000HzPlug Type: Line TypeResistance: 16ΩSensitivity: 94±2dBAdditional Information:Is Wireless: No (despite what is mentioned in the "Quick Details")Support Memory Card: NoVolume Control: NoThe QKZ DM9 is a wired earphone designed for mobile phones, featuring a dynamic vocalism principle, effective noise-canceling, and a built-in microphone for high-quality audio and communication.