111010
20V Multi-Function Inflator  EN
*** X=1-999, A-Z, M1-M9 there are only used for different 
customers, there are no safe relevant changes between 
these models
Category Model Capacity
20 V Battery
WA3550 1.5 Ah
WA3550.1 1.5 Ah
WA3551 2.0 Ah
WA3551.1 2.0 Ah
WA3553 4.0 Ah
 20 V Charger
WA3760 0.4 A
WA3869 2.0 A
WA3880 2.0 A
We recommend that you purchase your accessories 
from the same store that sold you the tool. Refer to the 
accessory packaging for further details. Store personnel 
can assist you and offer advice.
OPERATING INSTRUCTIONS
To reduce the risk of injury, user must read 
instruction manual
INTENDED USE
This product is a multifunctional device, combining 
inflators, tire pressure monitor, lighting, SOS warning 
four functions in one.
ASSEMBLY AND OPERATION
ACTION FIGURE
BEFORE OPERATION
Checking the Battery Pack 
Condition
NOTE Fig. A1 only applies for the 
battery pack with battery indicator 
light.
See Fig .A1
Removing the Battery Pack See Fig. A2
Charging the Battery Pack See Fig. A3,A4
Installing the Battery Pack See Fig. A5
OPERATION
Power button 
Press the button to turn on the tool 
and hold the button to turn it off.
NOTE: To avoid unintentional 
start up, the power button
will automatically shut down 
when the Start/Stop button 
is not pressed for a certain 
period after the power
button is turned on. 
See Fig. B
Changing the unit of measure
Press INCREASE AIR PRESSURE 
BUTTON and DECREASE AIR 
PRESSURE BUTTON simultaneously 
to change the unit of measure
See Fig. C
Setting the pressure 
Press INCREASE AIR PRESSURE 
BUTTON or DECREASE AIR 
PRESSURE BUTTON to set the 
pressure value. 
NOTE Object’s original air pressure 
will be displayed once connected. 
Without connection, “0” will be 
displayed.
See Fig. D
Inflating
Connect the object to the tool. Then 
press Start/Stop button. Once it 
reaches the set pressure, the tool 
will automatically stop.
NOTE Make sure all connections 
have been tightened before 
inflating.
NOTE In E2, loosen the locking nut 
on the valve stem first. 
WARNING: When inflating the 
floating tube, check the status 
of the tube rather than using the 
pressure value on the gauge.
See Fig. 
E1,E2,E3, E4
Work Light
Press the work light button to 
cycle through work light or SOS 
emergency light.
WARNING: Do not look 
towards the light directly.
See Fig. F
Storing adapter and hose  See Fig. G1,G2
Battery protection system  
The tool is equipped with a battery protection system. 
The system will automatically cut off power to the tool 
to extend battery life. The tool will automatically stop 
during operation if the battery is placed under one of the 
following conditions:
• Overloaded: The tool is operated in a manner that 
causes it to draw an abnormally high current. In this 
situation, turn the tool off and stop the application that 
caused the tool to become overloaded. Then turn
the tool on to restart.
• Low battery voltage: The remaining Battery capacity 
is too low and the tool will not operate. In this 
situation, remove and recharge the Battery.