Operation/State
Power on
Linking mode
Turning off
Charging indicator
Charged
Connection
No connection
Call
Busy
FIRST USE
The BoomBoom 540 has a built-in rechargeable battery.
We recommend completely charging the battery before using the
device for the first time. Connect the supplied USB cable to the
BoomBoom 540 and a PC, Mac or USB power adapter. The red LED
will light up.
The device may take up to 4 hours to charge for the first time. Once
the BoomBoom 540 battery is completely charged, the red LED will
switch off.
BOOMBOOM 540
LED Indicator Instructions
LED indicator status
blue light glittering
red and blue light glittering in turn
red light on and extinguish
red light on
red light extinguish
red light glittering
5s glittering
blue light glittering
blue light glittering
WEARING STYLE
Watch the left and right indications on the
outside of the headband. When wearing the
BoomBoom 540, please make sure the Power
button is always on the right hand side.
operating method/result
press the power key for 5s
hold the power key for 7s
press the power key for 4s
red light on
red light extinguish
glittering every 5s
glittering every 0.5s
press the power key to receive
glittering every 5s
5