07
QUICK START
POWER ON
Start the power switch,
the channel indicator
will light up.
POWER ON
POWER ON
ON
OFF
BATTERIES AND CHARGING
Connect to
the socket
U4 provides USB charging cable
，
you can connect to USB
Charger Adapter or other USB charging devices
Note:
Turn off the power switch while charging. Please do
not use U4 when charging, which may reduce battery life.
* Always store U4 at
room temperature
* When storing the unit,
please check the
battery state regularly
and charge if necessary.
0:15
0:30
1:00
2:30
30 min
1 hours
2 hours
5 hours
CHARGING TIMES BATTERY LIFE
Connect
Power
OR
