Volume On/Off
LED Bass
level
The colored LED gives the status of the BoomTube’s power:
LED, off
BoomTube off, connected to AC power. Battery is fully charged.
Green, steady on
BoomTube on, connected to AC power.
Green, blinking
BoomTube off, connected to AC power, battery is charging.
Amber
Running on battery power, at least 10% of the charge remains.