Feature:1. Noise Cancelling: Call centre headset has a built in HD microphone, so your voice is clear. It provides clear conversations even in noisy environments and can be twisted at will.2. No Burden: Business headset offers you an ultra lightweight wearing experience. The soft ear cushions and flexible headband will not weigh down your ears and provide long lasting wearing comfort.3. Convenient to Use: Communication headset adopts 3.5mm plug, plug and play, no driver required, easy to use. Supports speaker volume adjustment and microphone mute function.4. Wear Resistance: Customer service headset is designed with rugged construction and materials to ensure superb performance and make it durable. The long headset cable provides flexibility of movement.5. Wide Application: On ear headphones are suitable for devices with a 3.5mm headphone jack. Ideal for home offices, call centres, telemarketing, customer service, teleconferencing, etc.How to Use:Plug and playSpecification:Item Type: Call Center HeadsetMaterial: ABSModel: H390D-3.5-MVColour: BlackType: BinauralPlug: Four 3.5mm PlugsFunction: Call, Speaker Volume Adjustment, Microphone MuteScope of Application: for Devices with 3.5mm Headphone JackSpeaker Parameters:Sensitivity: 105±3dB (at 178mV 1KHz)Voice Coil Impedance: 150±15Ω (at 1KHz)Frequency Characteristics: 100Hz-10KHzDistortion: ≤5% (at 178 mV 1KHz)Microphone Parameters:Directivity: Single PointingSensitivity: -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 xCall Center Headset