Headphone
Speaker size : 40mm
Frequency response : 20Hz -20 KHz
Sensitivity : 105dB S.P. Lat 1KHz+/-2%
Impedance :  32 Ω 
Plug : 3.5 mm
Cable Length : 1.8 M
Microphone
Drive unit : 6x5mm
Sensitivity : -58dB 0dB=1V/pa at 1 Khz
Earphone
Speaker size  : 10mm
Frequency range : 20Hz-20KHz
Sensitivity  : 105dB S.P. Lat 1KHz+/-2%
Impedance : 32 Ω 
Plug   : 3.5mm
Cable length : 1.0M