Loudspeaker Specification
Driver Unit : diameter 30mm Cobalt Magnet
Impedance : 32 Ohm 
Frequency Response : 20 -20,000 Hz
Sensitivity : 118 dB z

Microphone

Type: 6mm Dia Electret Condenser Microphone

Direction: Noise Cancelling

Impedance:Low

Sensitivity: -58dB

Frequency Response: 30-16000Hz