Uniden Radio User Manual

• 15 GMRS / 7 FRS Channels
• 142 Privacy Codes

(CTCSS Tone and DCS Code)

• Up to 15 Mile Range*
• Scramble
• Internal VOX Circuitry
• 5 Selectable Call Tone Alerts
• Backlit LCD Display
• Optional Headset Accessories
• Headset Jack
• Roger Beep

1 Antenna
2 PTT (Push-To-Talk) Button
3 Power Boost Button
4 Monitor Key
5 Menu  Key
6 Channel Tone/Scan Key
7 Speaker
8 Up/Down Button
9 Headset Jack

10 On/Off Key
11 Call Key
12 Microphone
13 DC IN 9V
14 Battery Level Meter

15 Receive Indicator
16 boost Indicator
17 Call Indicator
18 Scan Indicator
19 Channel Indicator
20 Hi Power Indicator
21 Low Power Indicator
22 Transmit Indicator
23 Volume Setting Indicator
24 Keypad Lock Indicator
25 VOX Indicator
26 Privacy Code Indicator
27 Scramble Indicator
28 Charging Contacts

Congratulations on your purchase of the Uniden
GMR1558-2CK (General Mobile Radio Service)
radio. This lightweight, palm-sized, radio is a 
state-of-the-art device, equipped with many 
valuable features. Use it at sporting events, to stay
in contact with family and friends, hiking, skiing,
outdoors, or in a neighborhood watch for vital 
communication.

Your package contains two GMR1558-2CK radios,
two rechargeable NiMH battery packs (#BP38), two
AC adapters (#AD-1004), two charging cradles
(#RC1041), two belt clips and this reference guide.
You can operate the unit using the rechargeable
NiMH battery pack or 4 AAA alkaline batteries 
(not included).

To order the following optional accessories, visit our
web site @www.uniden.com or call 1-800-554-3988,
Mon-Fri, 8 a.m. to 5 p.m. CST. Use only Uniden
accessories.
•  NiMH Battery Pack - #BP38
•  Charging Cradle - #RC1041
•  Headset - #HS910/HS915
•  AC Adapter - #AD-1004
•  DC Adapter - #DC-1002

Your GMR1558-2CK radio uses a supplied NiMH
battery pack or 4 AAA alkaline batteries (not 
included).

To install the NiMH battery pack:

1) Make sure your radio is OFF.
2) Remove the battery compartment door by 

pressing the tab at the bottom of the 
compartment door, and remove the cover.

• Power Boost Button for

Maximum Range

• Battery Charger
• Battery Level Meter
• Channel Monitor
• Channel Scan
• Keypad Lock
• DC IN 9V Jack

This unit has a battery level meter on the display to 
indicate the status of the batteries. When the 
battery in the unit is low, the battery level meter
icon 

flashes. Recharge the NiMH battery

pack immediately or, if you are using the alkaline
batteries, you must replace the alkaline batteries in
order to continue using the radio.

Warning! To avoid the risk of personal injury or
property damage from fire or electrical shock, only
use the Uniden accessories specifically designated
for this product.

If you use the rechargeable NiMH battery pack, two
GMR1558-2CK radios can be charged directly or by
using the supplied charging cradle.

Charge by Using the Radio
1) Connect the AC or DC adapter’s plug to the

radio’s DC IN 9V jack and plug the other end into
an appropriate power source.

2) Charge the battery pack for 16 hours until the 

battery indicator stop flashing.

Using the Charging Cradle
1) Connect the AC or DC adapter’s plug to the

radio’s DC IN 9V jack and plug the other end into
an appropriate power source.

2) Set the charging cradle on the desk or tabletop,

and place the radio in the charging cradle with
the keypad facing forward.

3) Charge the battery pack for 16 hours until the

battery indicator stops flashing. Then remove the
radio from the charging cradle after completing
charging.

Note:
• DC IN 9V Jack of the radio is for charge only.

3) Install the NiMH battery pack into the battery

compartment. Be certain to follow the 
instructions written on the label on the battery
pack. Installing the battery pack incorrectly will
prevent the unit from operating.

4) Replace the battery compartment door.

In order to get the most out of your new radio, read
this reference guide completely before attempting to
operate the unit.

Turning the Radio On and Adjusting the Volume
1) Press and hold the 

key to turn the radio ON,

and increase the speaker volume by pressing the

▲ button. To decrease the volume, press the ▼
button.

2) Press and hold the 

key again to turn the

radio OFF.

Adjusting the Sound (Key Beeps)
Your radio emits a beep each time one of the keys
(except for the PTT and Power boost button and
call key) is pressed. To turn this sound OFF, press
and hold the call key while turning ON the radio.
Repeat this step to turn the sound ON.

Choosing a Channel
Your radio has 22 channels and 142 Privacy codes
you can use to talk to others. In order to speak to 
someone, each of you must be set to the same 
channel and Privacy Code.

To choose a channel:

With the radio in "Normal" operating mode press
the chan tone/scan key and press the 

▲ or ▼

button to increase or decrease the channel number 
displayed.

Note: Channels 1-7 have an typical range of up to
15 miles by pressing the Power boost button.
Channels 8-14 have an typical range of up to 5
miles. Channels 15-22 have an typical range of up
to 15 miles by pressing the Power boost button.
You can know which GMRS or FRS channel is
active by the icon. hi icon is displayed while 
scanning GMRS channels, and the lo icon is 
displayed while scanning FRS channels.

Choosing a Privacy Code
Each of the channels 1-22 may have any one of 
the codes, OFF or 1-142 selected. Code oF (OFF) 
indicates no Privacy Code selected and your radio
can receive a signal regardless of the code settings
of the transmitting radio.

1) Press chan tone/scan in channel select mode.

The privacy code indicator will flash.

2) Press the 

▲ or ▼ button to increase or

decrease the code number displayed. You can

also select oF (OFF) at this stage.

3) Exit the Menu.

Channel Scan Feature
Your GMR1558-2CK radio has a channel scan 
feature that allows you to easily scan all 22 
channels. When an active channel is detected, the
radio pauses on that channel until the channel is
clear. Then after a 2 second delay, the radio 
continues scanning. Pressing the PTT and Power
boost button while the scan is paused on a 
channel allows you to transmit on that channel.

To turn ON channel scan:

Press and hold the chan tone/scan key until the
scan... icon is displayed. The channel number on
the display changes as the radio rapidly cycles
through the channels.

To turn OFF channel scan:

Press the call, PTT, Power boost or menu key, or
press and hold the chan tone/scan key for 2 
seconds.

To talk to others using the radio:

1) Press and hold the PTT button and speak in a

clear, normal voice about 2-3 inches away from
the microphone. While you are transmitting, the

icon appears on the display. To avoid cutting

off the first part of your transmission, pause
slightly after pressing the PTT button before you
start talking.

2) When you have finished speaking, release the

PTT button. You can now receive incoming calls.
While receiving, the 

icon appears on the 

display.

Note: When you press the Power boost button,
boost and 

Warning! The typical range of GMRS channels can
be boosted only with NiMH batteries. When the
Power boost key is pressed while using alkaline
batteries, hi icon appears instead of boost icon and
the range is not boosted.

Monitor Mode Feature
Your GMR1558-2CK radio allows you to listen for
weak signals on the current channel at the press of
a key.

To turn ON the Monitor Mode:
• For brief listening, press mon button. The 

icon blinks.

• Press and hold mon button for 2 seconds untill

two beeps sound for continuous listening. The

receiver circuit stays open, letting both the noise
and weak signals to be heard.

To turn OFF Monitor Mode:

Press mon button to return to "Normal" mode,
and the 

icon stops blinking and disappears.

Navigating through the Menu
To access the advanced features of the GMR1558-
2CK, your radio has a Menu function.

1) To enter the Menu, press the menu key.
2) Additional presses of the menu key advances

you through the Menu until exiting to "Normal"
operating mode.

3) Other methods of exiting the Menu function are:

a. Press and hold the 

key again.

b. Press the PTT, Power boost, mon, call or

chan tone/scan key.

c. Wait 10 seconds until the unit automatically

returns to “Normal” mode.

Setting Scramble
Scramble feature allows you to make a private 
conversation. No one listening to your conversation
can understand what you are talking about. Be sure
that your party also sets their radio to the scramble
feature.

To set Scramble:

1) Enter the Menu.
2) Select on using 

▲ or ▼ button.

Voice Operated Transmission
Your GMR1558-2CK radio is equipped with a user 
selectable Voice Operated Transmitter (VOX) that
can be used for automatic voice transmissions. The
VOX feature is designed to be used with a headset
with a microphone. Transmission is initiated by
speaking into the remote microphone instead of
pushing the PTT and Power boost button.

To select the VOX level:

1) Enter the Menu. Advance through the Menu until

the vox icon appears on the display. The current
level (OFF, 1-5) will be indicated. Level oF (OFF)
disables VOX, while levels 1-5 set the 
sensitivity of the VOX circuit.

2) Press either the 

▲ or ▼ button to the desired

VOX sensitivity level. Use level 1 for increased 
sensitivity to voice in normally quiet 
environments, and use a higher level to reduce
undesired activation in very noisy environments.

Transmitting a Call Tone
Your GMR1558-2CK radio is equipped with 5 
selectable call tones that are transmitted when the

call key is pressed.

To select a call tone:

1) Enter the Menu. Advance through the Menu until the

call icon is shown on the display. The current call
tone number (1-5) is indicated.

2) Press the 

▲ or ▼ button to increase or decrease the

number to the desired call tone. Each tone will be
heard through the speaker.

To transmit the selected call tone, press the call key.
The selected tone will automatically be transmitted for a
fixed length of time. Call Tone will be cancelled when the
PTT and Power boost button is pressed.

Key Lock
To lock the keypad:

1) Enter the Menu. Advance through the Menu until the

icon appears on the display. The current Key

Lock status oF (OFF) blinks on the display.

2) To switch the Key Lock mode from oF (OFF) to on,

press the 

▲ button.

3) To confirm the setting, press the menu key.

The radio returns to the "Normal" mode.

Note: If you exit the setting mode before confirming your
selection by pressing the menu key, the Key Lock 
setting will be set to oF (OFF).

To unlock the keypad:

1) Press and hold the 

key to turn the radio OFF.

2) Press and hold the 

key again to turn the radio

ON. The keypad is unlocked.

Automatic Power Save Feature
Your GMR1558-2CK radio has a unique circuit designed
to dramatically extend the life of the batteries. If there is
no transmission nor an incoming call within 3 seconds,
your radio switches to the Power Save mode. The radio
is still able to receive transmissions in this mode.

LCD Backlight
The LCD Backlight automatically turns ON when any
key (except the PTT and Power boost button) is
pressed. The LCD display illuminates for 10 seconds
before turning OFF.

Roger Beep
Roger Beep is a BEEP that is sent to notify the end of
transmission (PTT, Power boost and VOX transmission).
Roger Beep can be heard through the speaker when
both Roger beep and Key Beep are set to ON. When
Roger beep is set to ON and Key Beep OFF, Roger
Beep will not be heard from the speaker but it will be
transmitted to your party. When Roger Beep is set to
OFF, Roger Beep neither be herad nor transmitted.

To turn ON Roger Beep:
Press and hold the 

▲ button while turning ON the radio.

To turn OFF Roger Beep:
Press and hold the 

▲ button while turning ON the radio.

Normal

Normal

Scramble

VOX Level

Call Tone

Key Lock

1-5

ON-OFF

OFF, 1-5

ON-OFF