Headphone:

• Driver: 40 mm
• Frequency Response: 20 Hz-20 kHz 
• Impedance: 32 ahms 
• Sensitivity: 107 dB@1 kHz SPL 
• 30 mW/1 cm 

Microphone: 

• Microphone Pickup Pattern: Cardioid ( Unidirectional ) 
• Type: Back Electret Condenser 
• Size: 4 mm 
• Frequency Response: 100 Hz- 10 kHz