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GMR2872-2CK/GMR2875-2CK

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LIQUID CRYSTAL DISPLAY

19

*Range may vary depending on environmental and/or topographical conditions.

•  15 GMRS / 7 FRS Channels

•  142 Privacy Codes (CTCSS Tone 

  and DCS Code)

•  Up to 28 Mile Range*

• Submersible design

• Direct Call

•  143 Group Codes

• Silent Mode

•  10 Selectable Call/Ring Tone Alerts

•  Backlit LCD Display

• Roger Beep

• Vibrate Reminder

 (GMR2875 Only)

1 Antenna
2  PTT (Push-To-Talk) Button
3  Power Boost Button
4 Monitor 

Button

5  Channel Up/Down Key
6 Tone/Group 

Key

7 D-call 

Key

8 Menu/Power 

key

9  Volume Up/Down key
10 Enter/Lock Key
11 Weather/Alert Key
12 Microphone

13 Speaker
14  Battery Level Indicator
15 Sub Code Indicator
16 Alert Indicator
17 Group Indicator
18 Receive Indicator
19 Call Indicator
20 Channel Indicator
21 Missed Call Indicator
22 Charging Contacts

Congratulations on your purchase of the Uniden 

GMR2872-2CK/GMR2875-2CK (General Mobile 

Radio Service) waterproof 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 - even 

outside by the pool!

Your radio complies with JIS7 water-resistant 

standards, which means the radio can be 

submerged in 1.0 meters of water for 30 

minutes without damage.

After your radio is submerged in water, you might 

notice that the sound is distorted. This is because 

there is still water remaining in and around the 

speaker and microphone. Just shake the radio to 

clear excess water, and the sound should return to 

normal.

Note: 

If your radio is exposed to salt water, clean 

your radio thoroughly with fresh water, and dry it 

before turning it on.

PACKAGE CONTENTS

Your package contains two radios, two rechargeable 

NiMH battery packs (#BP38), one AC adapter (#AD-

314), one charging cradle (#RC1282), two belt clips 

and this reference guide. You can operate the unit 

using the rechargeable NiMH battery pack. 

To order the following optional accessories, visit our 

web site @www.uniden.com or call 1-800-554-3988 

during business hours.

Use only Uniden accessories.

•  NiMH Battery Pack - #BP38
•  Charging Cradle - #RC1282
•  AC Adapter - #AD-314

GMRS LICENSE

The radio operates on the General Mobile Radio 
Service (GMRS) frequencies when using 
Channels 1-7 and channels 15-22. You must 
have a GMRS license issued by the Federal 
Communications Commission to legally use 
these channels. For licensing information and 
application forms, visit the FCC online at: www.
fcc.gov/wtb/uls or call the FCC hotline at 1-800-
418-3676. If you have any questions, you can 
contact the FCC direct at 1-888-225-5322. No 
license is required for operation on channels 
8-14 or operation on any channel in Canada.

INSTALL THE BATTERY

Your radio uses a supplied NiMH battery pack.

To install the NiMH battery pack:
1) Make sure the radio is off.
2) Turn the screw holding the battery compartment 

counterclockwise with a screwdriver, and hold 
up the battery cover.

3) Put the NiMH battery pack in the battery 

compartment applying the battery contacts to 
the lower charge contacts. Be sure to follow the 
instructions written on the battery pack’s label. 
Installing the battery pack incorrectly will prevent 
the unit from operating.

4)  Before placing the battery cover back on the 

radio, check the rubber seal around the battery 
compartment and the ribbon of the battery pack 
: make sure that the seal is in good condition 
and that there is no foreign matter under the 
seal. 

5) Replace the battery compartment door. Tighten 

the screws securely.

Note:

 

If the rubber seal appears warn, nicked, or 

dried out, replacement seals are available from 
www.uniden.com or call 1-800-554-3988 during 
business hours.

USING THE RADIO

SETTING UP GROUP MODE

USING THE RADIO BATTERY LEVEL AND LOW 

BATTERY ALERT

This radio has a battery level meter that indicates 

the status of the batteries. When the battery level is 

low, the battery level meter icon 

 flashes and 

then 

BATT

 appears after 30 seconds. Recharge 

the NiMH battery pack immediately.

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.

GMR2872-2CK/GMR2875-2CK RADIO

CHARGING THE RADIO

Your radio includes charging cradle and 

rechargeable battery packs. Follow these 

instructions to recharge the radios in a charging 

cradle.

Make sure to turn the radio OFF before placing 

the radio in the charging cradle.

Using the Charging Cradle

1) Connect the adapter's plug to DC IN 9V jack of 

the charging cradle and plug the other end into 

an AC outlet.

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 

MENU/ 

 to turn the radio 

ON.

2) To change the volume level, press the 

VO

 

 

or 

 

to increase or decrease the volume 

level then press 

ENTER/ 

.

3) Press and hold the 

MENU/ 

 to turn the radio 

OFF.

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, both your radios must be set to the same 

channel and Privacy code.
To choose a channel:
Press 

CH

 

 

or   to increase or decrease the 

channel number displayed.

  To change the channel continuously, press 

CH

 

 

or  , then repeatedly press and hold 

CH

 

 

or   for more than 1 second.

Note:

 

Channels 1-7 and 15-22 have a typical range 

of up to 28 miles by pressing the 

Power Boost

HI

 is displayed when you select a GMRS channel, 

and 

LO

 is displayed when you select a FRS 

channel.

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

and place the radio in the charging cradle with 

the keypad facing forward.

3) Make sure that the LED illuminates. Charge the 

battery pack for 16 hours and remove the radio 

from the charging cradle after charging.

Note:

 

•  Charge time may vary depending on the battery 

life remaining.

•  For fastest charging, turn off the radio before 

charging.

Warrning!:

 

 

•  The charging cradle is not waterproof. If the 

charging cradle falls into water, unplug it before 

attempting to remove it from the water. Allow the 

cradle to dry completely before reconnecting the 

power.

•  Wipe off dirt or shake water from your radio 

before placing in the charging cradle if your 

radio is soiled or wet.

In order to use Group Mode you need to initialize 

a couple of settings in your radio:

  Set the radio to Group Mode

  Set a Group Code

  Set a Unit Number

  Set a "Nickname"

Setting the Radio to Group Mode

To set the radio to Group Mode, which enables 

Direct Call, Auto Channel Change and All Call, 

press and hold 

TONE/GROUP

 for 2 seconds. The 

radio displays 

GRP

 and group code.

Note:

 

In group mode, you cannot receive 

transmissions from other radios unless they are 

also set to the same channel and group code.

Setting the Group Code

Set the group code for your radio group from 

0-142. Everyone in your group must select the 

same group code in order to communicate with 

each other.

1) Tap 

TONE/GROUP

 in group mode. Press 

CH

 

 

or   to select the group number.

2) Press 

ENTER/ 

 or 

TONE/GROUP

 to return to 

normal operation.

Setting the Unit Number

Each radio in your group needs to be set to a 

unique unit number, from 1-16.

1) Press 

MENU/ 

. Advance through the menu 

until 

UNIT

 appears, and then press 

ENTER/   

The current unit number flashes.

2) Press 

CH

 

 

or   to select the desired unit 

number.

3) Press 

ENTER/ 

 to continue to the next 

section.

Setting Your Nickname

Your nickname appears on other units’ displays 

when you make a All Call or direct call. This is 

also the name that appears on other radio displays 

when someone wants to make a direct call to you. 

When no nickname is set, the unit number 

appears.

1) Press 

MENU/ 

. Advance through the menu 

until 

UNIT

 appears, and then press 

ENTER/ 

The current unit number flashes, then tap 

ENTER/ 

. The radio displays 

n - - - -

 (or your 

current nickname) with the first place in the 

nickname flashing.

2) Press 

CH

 

 

or   to select the letter, then 

ENTER/ 

 to advance to the next letter until you 

have entered your nickname.

3) Press 

MENU/ 

 to confirm the setting and exit 

the menu.

Using Group Mode

Group mode lets you make direct calls to other 

people in your group without alerting the entire 

group and also lets you quickly change everyone in 

your group to another channel from a single radio. 

Before using group mode, follow the instructions in 

"Setting Up Group Mode" on every radio in your 

group. Then, to record the unit ID and everyone’s 

nickname in every radio, send a call to "All" from 

each radio one time (see "Sending a Direct Call").

Sending a Direct Call

Direct Call lets you call everyone in your group at 

once, or call a single person in your group without 

anyone else in the group knowing. It is like a 

"speed dial" directly to the person(s) you want to 

talk to.

To call everyone in your group, press 

D CALL

 in 

group mode. The radio flashes 

ALL

. Then, press 

D CALL

 or 

ENTER/ 

. Everyone in your group 

receives a call "chirp" for about 3 seconds. When 

the chirp ends, begin your conversation.

Note:

 

When you make a direct call to "all," your 

radio also sends out your nickname or ID so that it 

will show up in the call list for everyone in your 

group.

To call one person in your group, without having 

other people know, press 

D CALL

 in group mode. 

Then, use 

CH

 

 

or   to select the person you 

want to call and press 

D CALL

 or 

ENTER/ 

. Your 

radio sounds tones for 3 seconds as it sends the 

call. When the selected person answers, you can 

begin your conversation. You can silence the call 

tones at any time by pressing 

PTT

 or 

Power 

boost

.

Your conversation remains private between you 

and the person you called until 15 seconds after 

your last conversation. Then, your radio 

automatically exits private mode.

Automatically Changing Channels

Auto Channel Change lets you easily coordinate a 

channel change for everyone in your group. You 

might want to do this when you find you are getting 

a lot of interference on your current channel. Or, 

you can use this feature to change from a low-

power channel (8-14) to one of the high-powered 

channels (1-7, 15-22) if you need more range (or to 

a low-power channel if you need longer battery 

life).

USING THE RADIO IN STANDARD MODE

Use the radio in standard (not group) mode when 

you need to be able to communicate with radios 

that do not have the group feature.

Choosing a Privacy Code

You can select a Privacy Code from 1-142 for each 

channel. 

oFF

 (OFF) indicates no Privacy code 

selected and your radio can receive a signal 

regardless of the code settings of the transmitting 

radio.

1) Press 

TONE/GROUP

. The Privacy code 

indicator flashes.

2) Press 

CH

 

 

or   to increase or decrease the 

code. You can also select 

oFF

.

3) Press 

ENTER/   

or 

TONE/GROUP

 to return to 

normal operation.

Note:

 

Only tones 1-38 are standard across radio 

brands. Other settings might differ from brand to 

brand. See the specifications for the specific tones 

used for each setting.

Channel Scan Feature

Your radio has a channel scan feature that lets you 

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 resumes scanning. 

Pressing 

PTT

 or 

Power boost

 while the scan is 

paused on a channel lets you transmit on that 

channel.

To turn on channel scan:
Press 

MENU/ 

. The radio displays 

SCAN

, and 

then press 

ENTER/ 

.The channel number 

changes as the radio rapidly cycles through the 

channels.
To turn off channel scan:
Press 

MENU/ 

PTT

Power boost

D CALL

 or 

WX/ALERT

.

Talking on Your Radio

To talk to others using the radio:
1) Press and hold 

PTT

 or 

Power boost

 and speak 

in a clear, normal voice about 2-3 inches away 

from the microphone. While you transmit, 

TXHI

 

or 

TXLO

 appears on the display according to 

the type of channel. To avoid cutting off the first 

part of your transmission, pause slightly after 

pressing 

PTT

 or 

Power boost

 before you start 

talking.

2) When you finish speaking, release 

PTT

 or 

Power boost

. You can now receive incoming 

calls. While receiving, 

RX

 appears on the 

display.

Note:

 

When you press 

Power boost

BOOS

 

appear on the display. The radio transmits at 

maximum power when a GMRS channel is 

selected. If 

Power boost

 is continuously pressed, 

1 minute after you start pressing 

Power boost

 the 

transmission stops and you hear a boost timeout 

error tone.

Monitor Mode Feature

Your radio lets you 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

MON

 appears 

and 

RX

 flashes.

  Press and hold 

MON

 for 2 seconds until two 

beeps sound for continuous listening. The 
receiver circuit stays open, so you hear both the 
noise and weak signals.

To turn off Monitor Mode:
Press 

MON

 to return to the previous mode. 

MON

 

and 

RX

 disappear.

Navigating through the Normal Menu

To access the advanced features of your radio has 

a Menu function. In order to use Auto Channel 

Change, you need to set your radio to Group 

Mode.

1) To enter the menu, press 

MENU/ 

.

2) Additional presses of 

MENU/ 

 advances you 

through the menu. After the last menu item, the 

radio exits to the previous mode.

3) Other ways to exit the Menu function are:

 a. Press 

PTT

Power boost

MON

D CALL, 

WX/ALERT 

or

 TONE/GROUP

.

 b. Wait 10 seconds until the radio automatically 

returns to the previous mode.

Setting Silent Mode

When you turn on the silent mode, all incoming 

calls are muted: the radio flashes the display 

backlight, the channel indicator, 

SLNT

 and 

CALL

 

to alert you to an incoming call. If you do not 

respond to the call within 15 seconds, the backlight 

turns off. The GMR2875 will also vibrate to remind 

you that you missed a call. Silent mode is disabled 

for 15 seconds when you transmit, receive, or 

press any other button.
To set the silent mode:
1) Enter the menu. Advance through the menu until 

the 

SLNT

 appears, then press 

ENTER/ 

. The 

current setting flashes.

2) Press 

CH

 

 

to display 

on

, then press 

ENTER/ 

.

Note:

 

To prevent unwanted silent alerts, be sure to 

use a Privacy code or group code whenever you 

use the Silent mode feature.

You can hear the received voice when you turn on 

channel scan and an active channel is detected 

even during silent mode. 

Missed Call Alerts

If you receive an incoming call while silent mode is 

on and do not respond, the radio will turn on the 

Missed Call icon. If you are using the Group Mode, 

the radio will also indicate the person who made 

the call.

The GMR2875 will additionally remind you of a 

missed call by vibrating every minute after the call 

for 3 minutes.

Scan
Mode

Silent
Mode

Auto

Channel

Change

Call
Tone

Unit
Setting

Roger
Beep

Beep
Tone

Start
Scanning

ON-OFF

Channel
Change

1-10

Setting
Unit
Number

Setting
Nickname

ON-OFF ON-OFF

•  Power Boost Button for 

 Maximum Range

• All Call

•  Auto Channel Change Call

• Battery Charger

•  Battery Level Meter

• Channel Monitor

• Channel Scan

• Group Scan

• Keypad Lock

•  NOAA Emergency /

 Weather Channels

•  Emergency Weather Alert

To start an auto channel change, on any radio in 

the group tap 

MENU/ 

. Advance through the 

menu until 

CHCX

 appears, then press 

ENTER/ 

The current channel flashes. Use 

CH

 

 

or   to 

select the target channel. You can check whether 

the selected channel is clear. Then press 

D CALL 

or ENTER/  .

Your radio chirps for about 10 seconds while it 

sends out the channel change signal. As each 

radio receives the channel change signal, it chirps 

once, then changes to the new channel.

To ensure all radios make it to the new channel, 

we recommend you:

  Make sure you are in an open environment, 

where the radio will get the best range.

  Optimize range during the channel change 

signal by raising the radio over your head to 
give the best possible height.

  Do a "roll call" on the new channel after the 

move to be sure no one was left behind. If you 
missed someone, return to the previous channel 
and issue the signal again.

Transmitting a Call Tone

Your radio is equipped with 10 selectable call tones 

that are transmitted when you press 

D CALL

 in 

standard mode. The selected tone will be also heard 

when someone places a direct call to you.
To select a call tone:
1) Enter the menu. Advance through the menu until 

CALL

 appears, then press 

ENTER/ 

. The 

current call tone number (1-10) flashes.

2) Press 

CH

 

 

or   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 

D CALL

The selected tone is transmitted for a fixed length of 

time. Call Tone is cancelled if you press 

PTT

 or 

Power boost

.

Roger Beep

Roger beep is a beep that is sent to notify the end 

of transmission. You can hear the roger beep can 

be heard through the speaker when both roger beep 

and Beep Tone are on. When roger beep is on and 

Beep Tone is off, you do not hear the roger beep, 

but it is transmitted to your party.
To adjusting the roger beep, enter 

MENU/ 

Advance through the menu until 

RGR

 appears, then 

press 

ENTER/ 

. The current setting flashes.

To turn OFF roger beep:
Press 

CH

   to display 

oF

, then press 

ENTER/ 

.

To turn ON roger beep:
Press 

CH

   to display 

on

, then press 

ENTER/ 

.

Adjusting the Sound (Beep Tone)

Your radio sounds a beep each time you press a 

key (except for 

PTT

 and 

Power boost

).

To adjusting the sound, enter 

MENU/ 

. Advance 

through the menu until 

TONE

 appears, then press 

ENTER/ 

. The current setting flashes.

To turn OFF this beep:

Press 

CH

   to display 

oF

, then press 

ENTER/ 

.

To turn ON this beep:

Press 

CH

   to display 

on

, then press 

ENTER/ 

.

Key Lock

Press and hold the 

ENTER/ 

 until the 

LOCK

 

appears. 

To exit Keylock on mode, press and hold 

ENTER/ 

 

again.

Note:

 

While in keylock on mode, you can still use the 

radio to receive transmissions, use 

D CALL

 in 

Standard mode, 

VO

 

 

or 

PTT

Power 

boost

MON

, and 

MENU/ 

 to turn on or off the 

radio.

UT042ZH_GMR2875-2CK_0714_1149.indd   1

UT042ZH_GMR2875-2CK_0714_1149.indd   1

7/14/2009   12:02:51 PM

7/14/2009   12:02:51 PM

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