Connector: 3.5mm +USB
Speaker diameter: 40 mm               
Speaker impedance: 32o                 
Speaker frequency response: 20Hz - 20KHz       
Speaker sensitivity: 110dB-3dB           
Microphone Specification: 9*7mm               
Microphone sensitivity: -58dB               
Microphone Directivity: Omni Directional
Headphone cable length:1.2M