Speaker size40mm ,Speaker sensitivity117dB @1mW-1kHz,Speaker max input power30 mW,Speaker frequency range20Hz-20.000Hz,Speaker bandwidth, music mode20Hz-20.000Hz,Speaker bandwidth speak mode100Hz-8.000Hz,Microphone type3 Digital MEMS,Microphone sensitivity-26 dBFS/Pa,Microphone frequency range100Hz-8.000Hz