Desktop USB Conference Speakerphone Microphone 360° Omnidirectional Condenser Plug & Play PC Computer Mic Compatible with Windows Mac for PC Laptop Video Conference Recording Chatting Gaming Online Class Skype VoIP Calls Model: M1 Directivity:  Omnidirectional  Matenial: Aluminum Alloy + Metal Mesh Cover    Sensitivity: 47±3dB  Output Impedance: <680Ω Frequecy Range: 100-16000HZ     MAX SPL: 110db    S/N Ratio: >58db   Operate Voltage Range: 1.0-10V   Connectivity; USB 2.0  Cable Length :about 10ft   ltem Weight: about 137g   ltem Dimension: D 70mm x H 18mm   Sound Pick-up Range: Max 10ft,Recommend within 6.5ft, System Requirements:  Windows XP or above (Windows Vista/7/8/1 0),  Mac OS 7 and above.