Feature:1. HD Mic: Call centre headset has a built in HD microphone to keep your voice sonorous and clear, providing clear conversations even in noisy environments, and can be twisted at any angle.2. Ergonomic Design: Phone headset offers you an ultra lightweight wearing experience. The soft ear cushions and flexible headband do not weigh down your ears.3. Convenient to Use: Customer service headset is easy to use, plug and play. QD quick plug and unplug connector, compatible for Hion.4. Sturdy and Durable: Call centre headset is designed with robust construction and materials to make it durable. The long headset cable provides flexibility of movement.5. Wide Application: Computer headset is perfect for call centres, online courses, Skype chats, teleconferencing and more.How to Use:plug and playSpecification:Item Type: Call Center HeadsetMaterial: ABSModel: H390D-QDColour: BlackType: BinauralPlug: QD Quick Plug and Unplug Interface, Compatible with Jebelang, HionFunction: TalkingSpeaker 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