Feature:1. NOISE CANCELLING: Headphones built in high definition microphone, can be twisted at will, clear. Provides clear dialogue even in noisy environments. Less noise and clearer sound.2. All Day Comfort: An ultra lightweight design ensures you can focus on your conversation with the headset for long lasting wearing comfort. Soft ear pads and flexible headband don't put any burden on your ears.3. EASY TO USE: This traffic headset comes with 3 section dual 3.5mm plugs, plug and play, no driver required, easy to use, universal black headset, classic, sturdy and durable.4. ULTRA 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 office headset is ideal for PC computers, home offices, call centers, telemarketing, insurance, customer service, conference calls, and more.How to Use:plug and playSpecification:Item Type: HeadsetModel: H390D-PCMaterial: ABSColour: BlackType: BinauralPlug: 3 Double 3.5mm PlugsFunction: CallScope of Application: for PCSpeaker Parameters:Sensitivity: 105±3dB (at 178mV 1KHz)Voice Coil Impedance: 150±15Ω (at 1KHz)Frequency Characteristics: 100Hz to 10KHzDistortion: ≤5% (at 178mV 1KHz)Microphone Parameters:Directivity: UnidirectionalSensitivity: -40±2dB (2.0V, 2.2KΩ, 1KHz)Distortion: ≤5% (at 4.5V 2.2kΩ 1KHz)Frequency Characteristics: 200Hz-6KHzCurrent Consumption: 100-500υA Package List:1 xTelephone Headset