Speaker size 40mm , Speaker sensitivity 117dB @1mW-1kHz, Speaker max input power 30 mW, Speaker frequency range 20Hz-20.000Hz, Speaker bandwidth, music mode 20Hz-20.000Hz, Speaker bandwidth speak mode 100Hz-8.000Hz, Microphone type 3 Digital MEMS, Microphone sensitivity -26 dBFS/Pa, Microphone frequency range 100Hz-8.000Hz