Feature:1. Speaker sound adjustment+microphone mute+6‑speed line sequence adjustment, 330° rotating head card, 330° swing arm microphone.2. Business‑grade broadband headsets can achieve clear calls and acoustic shock protection, can be used for phones in call centers and offices.3. With high‑definition audio sound, it can ensure that the call center, office and home PC chat can communicate clearly even in a noisy environment.4. Wideband audio solutions provide natural and clear hearing. Anti‑acoustic shock can block sudden sounds to protect hearing.5. The ultra‑comfortable phone headsets are equipped with soft protein artificial leather ear pads, which are user‑friendly and hygienic.How to Use:Plug and play.Specification:Item Type: Telephone HeadsetMaterial: ABSRotatable Head Card 330°Rotatable Swing Arm 330°Speaker Parameters: Sensitivity: 105±3dB(178mV 1KHz)Impedance: 150±15Ω（1KHZ）Frequency Characteristics: 100Hz-10KHzDistortion: ≤5% (at 178 mV 1KHZ)Microphone Parameters:Directivity: Single PointSensitivity: –40±2dB(2.0V,2.2KΩ,1KHz)Distortion: ≤5%(4.5V 2.2KΩ 1KHZ)Frequency Characteristics: 200Hz-6KHzCurrent Consumption: 100-500υAApplication: Suitable for devices that can be connected to RJ9 interface, very suitable for skype chat, business, call center, conference call, listening and speaking, long-speaking, online courses, web seminars, etc.Package List:1 x Telephone Headset1 x Manual