Feature:1. Noise Cancelling Mic: Telephone headset has a built in HD microphone, providing clear conversations even in noisy environments. The microphone can be twisted for flexibility and convenience.2. Ergonomic Design: Call centre headset has soft ear cushions and a flexible headband that won't weigh down your ears, for long lasting wearing comfort.3. Easy to Use: Computer headset has 2.5mm plug; plug and play, no driver required, easy to use. Supports speaker volume adjustment and microphone mute.4. Srurdy and Durable: 2.5mm business headset is designed with rugged construction and materials to ensure superb performance and make it durable. Long headset cable provides flexibility for mobility.5. Versatile Use: Computer headset is suitable for devices with a 2.5mm headset jack. Ideal for home offices, call centres, telemarketing, insurance, customer service, teleconferencing, etc.How to Use:plug and playSpecification:Item Type: Call Center HeadsetMaterial: ABSColour: BlackModel: H390-2.5MVType: MonauralPlug: 2.5mm PlugFunction: Call, Speaker Volume Adjustment, Microphone MuteScope of Application: for Devices with a 2.5mm 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