1、ENC Noise Reduction: The telephone headset adopts ENC active noise reduction and has a built in high definition microphone that can be twisted at will; making your voice high and clear. 2、Comfortable and Flexible: The traffic headset provides you with an ultra lightweight wearing experience. Soft ear pads and flexible headband don't put any burden on your ears. 3、Multifunctional: The customer service earphone comes with a USB plug, plug and play, no driver required, and easy to use. Support speaker volume adjustment, mute and microphone mute. 4、Sturdy and Durable: The earphones are designed with sturdy construction and materials to ensure super performance and make them durable. The long headphone cable provides flexibility on the move. 5、Wide Compatibility: The USB business headset works with devices with a USB interface. Ideal for home, offices, call centers, telemarketing, insurance, customer service, conference calls, and more. 1 x USB Business Headset Item Type: USB Business HeadsetMaterial: ABSModel: H300D USB ENCColor: BlackType: BinauralPlug: USB PlugFunction: Call, Speaker Volume Adjustment, Mute, Microphone MuteScope of Application: Used for Devices with USB InterfaceSpeaker Parameters:Sensitivity: 105±3dB (at 178mV 1kHz)Voice Coil Impedance: 150±15Ω (at 1kHz)Frequency Characteristics: 100Hz-10kHzDistortion: ≤5% (at 178mV 1kHz)Microphone Parameters:Directivity: Single PointSensitivity: -40±2dB ( 2.0V, 2.2KΩ, 1kHz)Distortion: ≤5% (at 4.5V 2.2KΩ 1kHz)Frequency Characteristics: 200Hz-6kHzCurrent Consumption: 100-500µA Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.