If the speaker is left in any of the following conditions for a certain time, it turns off automatically.

When the speaker is in the BLUETOOTH mode

• No operation on the speaker.
• No BLUETOOTH connection has been established between the speaker and a smartphone or a mobile phone via HFP/HSP.
• No music (sound) is played, when the speaker is connected to a BLUETOOTH device.

When the speaker is in the AUDIO IN mode

• No operation on the speaker.
• No music (sound) is played on an audio device connected to the AUDIO IN jack.
• Music (sound) of an audio device connected to the AUDIO IN jack is too small.