1.Driver Unit:Φ50MM 
2.Speaker Impedance:32Ω
3. Power: 25MW
4. Voltage: 4.5V                             
5.Frequency Response：20HZ-20KHZ       
6.Speaker Sensitivity：106dB ±3dB (@ 1KHZ) 
7.Microphone Sensitivity: -42dB ±3dB                     
8.Impedance: 2.2K
9.Frequency: 100-16KHZ

10.Cord Length：2.2M braided