SRS-XB21 | Help Guide | About the indicators

About the indicators

Turns off	The speaker has completed charging.
Lights up	The speaker is being charged.
Flashes slowly	The built-in battery is running at less than 10% and needs to be charged.
Flashes 3 times and turns off	If the CHARGE indicator flashes 3 times and goes off when you turn on the speaker, the built-in battery is empty and needs to be charged.

A speaker that is in use can be charged if it is connected to an AC outlet via a USB AC adaptor (commercially available), or connected to a booted computer. In this case, it may take longer to charge the built-in battery depending on the conditions of use. Therefore, it is recommended to turn off the speaker when charging.
When you use the speaker at a loud volume for a long time, the built-in battery may run low even if the speaker is connected to an AC outlet via a USB AC adaptor (commercially available), or connected to a booted computer. As a result, sound becomes low. This is not a malfunction. Turn off the speaker and charge the built-in battery sufficiently.
In an extremely cold or hot environment, charging stops for safety. If charging takes a long time, it also makes charging of the speaker stop. To resolve these issues, disconnect the micro-USB cable from the speaker and connect it again within an operating temperature between 5 °C and 35 °C (41 °F and 95 °F).

Turns off	The speaker is turned off.
Lights up (green)	The speaker is turned on. The STANDARD mode is set. (The EXTRA BASS and LIVE SOUND mode are not set.)
Lights up (white)	The speaker is turned on. The EXTRA BASS mode or LIVE SOUND mode is set. When you purchase, the EXTRA BASS is set.
Lights up (orange)	The speaker turns off. The speaker is set to the BLUETOOTH standby mode.
Flashes (green, white, red or orange)	Each time you press the -/+ (volume) buttons, the indicator flashes once.
	When you operate the–/+ (volume) buttons and the volume is set at the lowest (0) or highest (50) level, the indicator flashes 3 times.
	Depending on the progress of the software update, the state that the indicator flashes in green changes. In each update, the indicator flashes in green 5 times, then 4 times, 3 times, twice, once, and turns off^*.
	When the speaker turns on for the first time after the software update, the indicator flashes 3 times in green or white to inform you that the update has completed.
	When the software update ends in error, the indicator flashes in red or orange.
	When the built-in battery is running at less than 10%, the indicator flashes in green or white slowly.
	If the indicator flashes in green or white 3 times and turns off after turning on the speaker, the built-in battery capacity is empty. Charge the speaker.

^* Depending on the situation, you may not be able to see all flashing patterns.

Lights up	The speaker is connected to a BLUETOOTH device.
Flashes quickly (3 times a second)	The speaker enters the pairing mode.
Flashes slowly	The speaker is waiting for a BLUETOOTH device to connect to.
Flashes 3 times	The software has completed updating.

Flashes	The speaker enters the Speaker Add function. The ADD (Speaker Add) indicator flashes when the connection with Speaker Add function fails.
Lights up	The Speaker Add function is used on the speaker.

Flashes	The speaker enters the Wireless Party Chain function.
Lights up	The Wireless Party Chain function is used on the speaker. The indicators of all speakers connected with the Wireless Party Chain function light up.