The JBL G0+ contains a frequency reaction range of 180Hz �?20 kHz. Aside from standard music playback, the speaker contains a noise-cancelling microphone which will also be used to take handsfree calls, also. It could attain eighty decibels, as loud being an electric vacuum, with tolerable levels of distortion. https://www.bluetoothspeaker.top/portable-speakers-system-with-wireless-microphone/