• Speaker Impedance : 320
• Speaker Sensitivity : 120±3dB
• Speaker Frequency Response : 20-20000HZ
• Maximum Povver Input : 30mW
• Microphone Size : 9.7x4.5mm
• Microphone Sensitivity -54dB±3dB
• Microphone Frequency Response 20-16000Hz
• Microphone Operating Voltage 4.5V
• Microphone Impedance *2.2K
•SNR . >58 Db
• Cord Length :2.2m