Feature:1. Noise Cancelling Mic: Telephone headset with flexible HD microphone. Make your voice large and clear. Less noise for clear conversations even in noisy environments.2. Comfortable To Wear: Business headphone features soft ear pads and a flexible headband that won't burden your ears. Ultra light, long lasting comfort and concentrate on conversation.3. Plug And Play: Wired telephone headset, three section dual 3.5mm plugs, plug and play, no need to drive, easy to use. Suitable for PC computers, with stable connection.4. Super Durable: Office headset features sturdy construction and materials for good performance and durability. The long headphone cable provides flexibility on the move.5. Wide Compatibility: Multifunctional headset, suitable for various scenarios such as home, office, call center, telemarketing, customer service, conference call, etc.How to Use:Plug and play.Specification:Item Type: Telephone HeadsetMaterial: ABSModel: H390D PC VAColor: BlackType: BinauralPlug: Three Section Dual 3.5mm PlugFunction: Call, Speaker Volume AdjustmentScope of Application: for PC ComputerSpeaker 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 Package List:1 x Telephone Headset