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Denitions: Safety Guidelines 
The definitions below describe the level of severity for each signal 
word. Please read the manual and pay attention to these symbols.
DANGER: Indicates an imminently hazardous situation 
which, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, 
if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if 
not avoided, may result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury 
which, if not avoided, may result in property damage.
KEY INFORMATION YOU SHOULD KNOW
• 
WARNING: 
Do not remove guard. The guard 
must be attached when trimming. Operating this trimmer without 
the guard will violate the product warranty.
• 
CAUTION: 
When replacing the line, use only 
.080 inches (2.032 mm) diameter line (MODEL NO. DWO1DT801 
OR DWO1DT802 are recommended). Other sizes may degrade 
performance or cause damage to the trimmer.
•  For use only with D
eWALT 20V batteries. 
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS OR 
ANY D
eWALT APPLIANCE, CALL US TOLL FREE AT: 1-800-4-DeWALT 
(1-800-433-9258).
Important Safety Warnings
WARNING: When using electric gardening appliances, 
basic safety precautions should always be followed to reduce risk of 
fire, electric shock, and personal injury, including the following.
READ ALL INSTRUCTIONS
•   ALWAYS WEAR EYE PROTECTION – Wear safety spectacles 
or goggles at all times when battery is installed. These items are 
available for purchase.
•   DRESS PROPERLY – Do not wear loose clothing or jewelry. They 
can be caught in moving parts. Gloves and substantial rubber 
soled footwear are recommended when working outdoors. Don’t 
operate the appliance when barefoot or wearing open sandals. 
Wear heavy long pants to protect your legs. Wear protective hair 
covering to contain long hair.
•   NYLON LINE – Keep face, hands and feet clear of rotating nylon 
line at all times.
•   THE ROTATING LINE PERFORMS A CUTTING FUNCTION – 
Use care when trimming around screens and desirable plantings.
•   DO NOT USE materials not recommended, such as metal wire, 
rope, and the like.
•   KEEP ALL BYSTANDERS AWAY – at a safe distance from work 
area, especially children.
•   MAKE SURE that other persons and pets are at least 100 feet 
(30m) away.
•   TO REDUCE THE RISK of rebound (ricochet) injury, work going 
away from any nearby solid object such as wall, steps, large stone, 
tree, etc. Use great care when working close to solid objects and 
where necessary, do trimming by hand.
•   AVOID ACCIDENTALLY STARTING – Don’t carry with finger on 
trigger when battery is installed.
•   USE THE RIGHT APPLIANCE – Do not use this appliance for any 
job except that for which it is intended.
•  
DON’T OVERREACH
 – Keep proper footing and balance at all times. 
•  
DON’T FORCE APPLIANCE 
– It will do the job better and with less 
likelihood of a risk of injury at the rate for which it was designed
•   DAMAGE TO UNIT – If you strike or become entangled with a 
foreign object, stop appliance immediately, remove battery, check