Item Type: USB Business Headset Material: ABS Model: H390-USB-2 Colour: Black Type: Monaural Plug: USB Interface Function: Call, Support Speaker Volume Adjustment, Microphone Mute, Volume One Key Mute Applicable Scope: Compatible with devices with USB interface Speaker Parameters: Sensitivity: 1053dB (at 178mV 1KHz) Voice Coil Impedance: 15015 (at 1KHZ) Frequency: 100Hz-10KHz Distortion: 5% (at 178mV 1KHZ) Microphone Parameters: Directivity: Unidirectional Sensitivity: -402dB (2.0V, 2.2K, 1KHz) Distortion: 5% (at 4.5V 2.2K 1KHZ) Frequency: 200Hz-6KHz Current Consumption: 100-500A1Function: USB business headset has functions of call, support speaker volume adjustment, microphone mute, volume one key mute. USB plug, plug and play, no need to drive, easy to use. 2Good Design: Corded single ear headset is designed with sturdy construction and materials to ensure super performance and make it durable. And the long headphone cable provides flexibility of movement. 3With Noise Cancelling Microphone: Single sided ear headphone has a built in noise cancelling microphone that can be twisted at will. It provides clear dialogue even in noisy environments. 4Ultra Lightweight Design: USB monaural headset has soft ear pads and a flexible headband that won't put any burden on your ears, and gives you all day wearing comfort for your chat. 5Wide Range of Applications: Traffic headset is suitable for devices with USB interface, ideal for users who handle a large number of calls, such as call center agents, telecom sales, etc.1 x USB Business Headset