A:Answer Hey Wang, thanks for sending us this question. Your JBL LINK 10 speaker may be running on low battery if you're seeing a single LED light up in red. Also your speaker's microphone is on mute if the color of the button is orange.
We suggest that you charge your speaker by plugging it directly into a wall outlet using the supplied USB cable — you should then see a progression of LEDs light up over time. To unmute the speaker, just press on the microphone button — you should see the light change to white and hear a message from the Google Assistant saying, "the mic is back on". If you haven't yet, set up your speaker on the Google Home app which is available on both the AppStore and Google Play store. The set up is easy, just follow the instructions on the app. If you need help with it, let us know through here: https://support.jbl.com/us/en/
