CONNECTING/DISCONNECTING LANYARD
CLEANING, STORAGE & PRODUCT LIFE
EP3 Sonic Defenders typically last up to 6+months, depending on usage and
care. Clean with mild soap and water or alcohol swabs and allow to air dry.
If exposed to salt water, rinse with fresh water and allow to air dry. Inspect
earplugs regularly and replace when they become stiff and hardened. Store in
a cool, dry place in the included container. Do not leave in direct sunlight. In
extreme storage temperatures, filters may separate from stems. If this occurs,
filters must be reinserted into stems before using.
NOTE: EP3s provide a reduced level of hearing protection with their noise-reducing filters removed.
RADIO COMMUNICATION SYSTEM USE
An EP3 earplug can also serve as an earpiece for compatible radio communication
systems by simply removing its noise-reducing filter (store in a safe place for
future use) and inserting the system’s elbow connector into the hole previously
occupied by the filter until snug.
18300 Mt. Baldy Circle •Fountain Valley, CA 92708, U.S.A •www.surefire.com/hearingprotection •800.828.8809
71-01-904 Rev.A
1. Starting with the EarLock®retention ring oriented slightly backward, rotate
the earplug forward while inserting the stem of the red-filtered EP3 into the
right ear canal deep enough for the uppermost flange to seal. Fit the retention
ring to the natural contour of the concha bowl surrounding the ear canal to
lock the earplug in place.
2. Check the seal by placing your fingertip over the outer hole of filter and then
removing. Detection of a slight suction indicates a proper seal.
3. Repeat process with white-filtered earplug for left ear.
4. Test earplugs by clapping, with filter caps out. If no noticeable decrease in
volume, reinsert and retest.
5. To block lower-level noise* in quiet environments and to maximize protection,
insert attached filter caps into filter holes and push in until snug.
* Inserting filter caps negates noise-reducing filters’ abilities to let ambient sounds and
conversations pass safely through.
FITTING & TESTING
WARNING: If the instructions above are not adhered to, the protection afforded by
EP3 Sonic Defenders will be severely impaired.
STEM ADJUSTMENT
EP3 Sonic Defenders®feature adjustable stems to maximize fit and comfort.
To adjust stem, with earplug removed from ear, pull out or push in stem to
lengthen or shorten for comfort.
Remove twist tie and uncoil lanyard.
Insert lanyard ends into small holes
on the outside of EP3s, located
beneath the noise-reducing filters,
and push in until lanyard ends snap
in place. To remove, pull gently on
lanyard ends until they disconnect
from earplugs.
SUREFIRE NO-HASSLE PROMISE
We’ll do what it takes to keep your SureFire gear running smoothly.
SureFire warrants that if you—our customer—purchase one of our products, and
we determine that it is defective in material and/or workmanship, we will repair or
replace it for free or refund your money—no hassle! SureFire Hearing Protection
products are warranted for 90 days from the date of purchase. Our warranty does
not cover consumables, or normal wear-and-tear, or damage resulting from abuse,
alterations, unauthorized repairs, or use contrary to SureFire’s user manuals. For
complete warranty information, visit www.surefire.com/warranty.
