Feature:1. WIDE APPLICATION: Ideal for home offices, call centers, telemarketing, insurance, customer service, teleconferencing, and more.2. NOISE CANCELLING: Noise reduction phone earphone, optional twist. Provides clear dialogue even in noisy environments.3. ERGONOMIC DESIGN: Soft ear pads and flexible headbands don't put any strain on your ears. Provides all day comfort.4. CONVENIENT TO USE: Three section double 3.5mm plug, easy to use; Plug and play, no driver required. Support call and speaker volume adjustment.5. WEAR RESISTANCE: The earphones are designed with a robust construction and ABS materials that ensure superior performance and make them durable.How to Use:Plug and playSpecification:Item Type: Telephone HeadsetMaterial: ABSModel: H360D-PC-MVColor: Black Type: BinauralPlug: Three Section Double 3.5mm Plug Function: Call/Speaker Volume AdjustmentScope of Application: for PC Computers Horn Parameters: Sensitivity: 105±3db (at 178mv 1khz) Voice Coil Impedance: 150±15Ω (At 1khz) Frequency Characteristics: 100Hz-10KHz Distortion: ≤5% (at 178 MV 1KHZ) Microphone Parameters: Directivity: Single Direction Sensitivity: -40±2dB（2.0V, 2.2KΩ, 1KHz） Distortion: ≤5%（At 4.5V 2.2KΩ 1KHZ） Frequency Characteristics: 200Hz-6KHz Consumption Current: 100-500υA Package List:1 x Telephone Headset