KEY
PRESS TO...
PRESS AND HOLD
TO...
MUTE
Turn AutoMute on
and off if there is no
signal. If there
IS
a
signal, it will mute
voice alerts for the
duration of the signal.
Turn Voice Alert on
and off if there is no
signal. If there
IS
a
signal, turns Voice
Alert off for duration
of the signal.
DIM
Change brightness
from BRIGHT to DIM
to DARK. Voice
announces “Bright,“
“Dim,” or “Dark.”
Turn POP alert on and
off. Voice announces
“POP on” or “POP off”
and
P
displays.
CITY
Change mode from:
HIGHWAY to CITY.
Voice announces
“Highway” or “City.”
Turn K band filter on
and off (LED dot turns
on and off). Voice
announces “K filter
on” or “K filter off”
and
F
displays briefly.
DIM +
CITY
NA
Return to factory
settings:
• Highway
• Bright
• Mute OFF
• Voice On
• K Filter ON
• POP OFF
• Auto Mute ON
MONITORING SPEED
A radar gun transmits radio waves at certain frequencies
that bounce off objects and return to the radar gun’s
receivers. The radar gun then calculates the speed of the
object. The LRD550 recognizes the following bands/
frequencies used by radar guns:
BAND FREQUENCY
X
10.525 GHz
K
24.150 GHz
Ka
33.400 - 36.000 GHz
Laser
800 nm - 1100 nm
RADAR DETECTOR DETECTORS
(RDD)
Radar detectors are illegal in some states. Law enforcement
officers use special equipment to detect signals radiated by
radar detectors. If they are in a state where radar detectors
are illegal and the officer detects a vehicle using a radar
detector, the operator of that vehicle could lose the radar
detector and be fined.
The LRD550 is designed to be invisible to signals from the
Spectre l/lV/IV+ and VG-2 RDDs.
CARE AND MAINTENANCE
Use common sense and your LRD550 will provide trouble-
free service. Please keep the following tips in mind:
• Don’t leave your unit on the dashboard during summer
months. Interior heat may exceed safe operating levels.
• Do not spray cleaners or other liquids on the unit.
Remove the unit when you are using these liquids.
• Do not use abrasive cleansers on the unit’s exterior.
TROUBLESHOOTING
IF...
TRY THIS...
No display or audio.
Check the fuse in the plug.
Replace if necessary.
The unit alarms
when the vehicle
hits bumps.
Check the connections. Be sure
they are all secure.
The unit alarms
briefly in the same
location but no radar
source was in view.
There may be a motion sensor or
house alarm in use within range.
The detector did not
alert when a police
car was in view.
The officer may not have radar/
laser units turned on.
SPECIFICATIONS
Receiver Type:
Radar
Double Conversion Superheterodyne
Self-Contained Antenna
Laser
Pulsed Laser Signal Receiver
Frequency:
X
10.525 GHz
K
24.150 GHz
Ka
33.400 - 36.000 GHz
Laser
800 nm - 1100 nm
Detector Type:
Radar
Scanning Frequency Discriminator
Laser
Pulse Width Discriminator
Alarm Type
Beep (Detected Band and Signal
strength)
Antenna Type:
Radar
Linear Polarized E-vector Vertical
Laser
Front
Convex Condenser Lens
Laser
Back
Concave Condenser Lens
Dimensions
110.00 mm (D) x 69.00 mm (W) x 29.50
mm (H)
Weight
4.1 oz (115g)
Operating
Temp.
-4° to +185° F (Radar/Laser)
-20° to +85° C (Radar/Laser)
Storage
Temp.
-22° to +203° F (Radar/Laser)
-30° to +95° C (Radar/Laser)
Operating
Power Soure
DC 11.0 to 16.0 V
FCC/Industry Canada Information
FCC: AMWLRD450
ICC: 513C-LRD450
This device complies with part 15 of the FCC Rules. Operation is sub-
ject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interfer-
ence received, including interference that may cause undesired oper-
ation.
Unauthorized changes or modifications to this equipment may void
compliance with the FCC Rules. Any change or modification must be
approved in writing by Uniden. Changes or modifications not
approved by Uniden could void the user’s authority to operate the
equipment.
L’appareil est conforme aux normes d’Industrie Canada. Son fonc-
tionnement est soumis aux deux conditions suivantes : (1) Ce disposi-
tif ne doit pas causer d’interférences et (2), il doit pouvoir accepter
les interférences, incluant celles pouvant nuire à son fonctionnement
normal.
Tous les changements apportés à cet appareil, s’ils ne sont pas
expressément approuvés par Uniden ou toute utilisation de celui-ci
d’une autre manière que celle décrite dans ce guide peut annuler
votre autorisation de le faire fonctionner.
One Year Limited Warranty
Keep your receipt! Proof of purchase is required for
warranty service.
WARRANTOR: UNIDEN AMERICA CORP.
(“Uniden”)
ELEMENTS OF WARRANTY: Uniden warrants, for one year, to the orig-
inal retail owner, this Uniden Product to be free from defects in mate-
rials and craftsmanship with only the limitations or exclusions set out
below.
WARRANTY DURATION: This warranty to the original user shall termi-
nate and be of no further effect 12 months after the date of original
retail sale. The warranty is invalid if the Product is (A) damaged or not
maintained as reasonable or necessary, (B) modified, altered, or used
as part of any conversion kits, subassemblies, or any configurations
not sold by Uniden, (C) improperly installed, (D) serviced or repaired
by someone other than an authorized Uniden service center for a
defect or malfunction covered by this warranty, (E) used in any con-
junction with equipment or parts or as part of any system not manu-
factured by Uniden, or (F) installed or programmed by anyone other
than as detailed by the Operating Guide for this product.
STATEMENT OF REMEDY: In the event that the product does not con-
form to this warranty at any time while this war-ranty is in effect,
warrantor will repair the defect and return it to you without charge
for parts, service, or any other cost (except shipping and handling)
incurred by warrantor or its representatives in connection with the
performance of this warranty. THE LIMITED WARRANTY SET FORTH
ABOVE IS THE SOLE AND ENTIRE WARRANTY PERTAINING TO THE
PRODUCT AND IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES
OF ANY NATURE WHATSOEVER, WHETHER EXPRESS, IMPLIED OR
ARISING BY OPERATION OF LAW, INCLUDING, BUT NOT LIMITED TO
ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. THIS WARRANTY DOES NOT COVER OR
PROVIDE FOR THE REIMBURSEMENT OR PAYMENT OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES. Some states do not allow this exclusion
or limitation of incidental or consequential damages so the above
limitation or exclusion may not apply to you.
LEGAL REMEDIES: This warranty gives you specific legal rights, and
you may also have other rights which vary from state to state. This
warranty is void outside the United States of America.
PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY: If, after
following the instructions in this Operating Guide, you are certain
that the Product is defective, pack the Product carefully (preferably in
its original packaging). Include evidence of original purchase and a
note describing the defect that has caused you to return it. The
Product should be shipped freight prepaid, by traceable means, or
delivered, to warrantor at:
Uniden America Corporation
C/O Saddle Creek
743 Henrietta Creek Rd., Suite 100
Roanoke, TX 76262
(800) 297-1023, 8 a.m. to 4:30 p.m., Central, Monday through Friday
POP Mode is a trademark of MPH Industries, Inc.
Issue 1, February 2015
