Feature:1. Clear Sound: Office headset has a built in HD microphone so your voice is crystal clear. It provides clear conversations even in noisy environments and can be twisted around at will.2. Lightweight and Comfortable: Call centre headset offers you an ultra‑lightweight wearing experience. The soft ear cushions and flexible headband won't strain your ears and provide long lasting wearing comfort.3. Convenient to Use: Customer service headset with 3.5 mm plug, plug and play, no drivers required. Supports speaker volume adjustment and microphone mute function.4. High Durability: 3.5mm business headset is designed with a robust construction and materials that guarantee superb performance and make it durable. The long headset cable provides flexibility for movement.5. Wide Application: Telephone headset for devices with a 3.5 mm headset jack. Ideal for home offices, call centres, telesales, customer service, teleconferencing etc.How to Use:Plug and playSpecification:Item Type: Call Center HeadsetMaterial: ABSModel: H390D-3.5VAColour: BlackType: BinauralPlug: 4 Sections Single 3.5mm PlugFunction: Call/Speaker Volume AdjustmentScope of Application: Compatible with 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