1,Frequency response:20Hz-20kHz
2,Speaker impedance :32Ω±15%
3,Driver unit:diameter 10mm mylar speaker
4,Rated power:3mW
5,Sensitivity:102-105dB
6,Microphone:4.5*2.2mm-42db+/-3db 7,Plug:3.5mm stereo
8,Wire:diameter 1.8mm, length 1.10M