Full Product Manual
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14
16
17
  To temporarily turn off auto squelch/ To turn 
maximum range extender on:
  – Press and hold the Max Range Hi/Lo button. 
  To turn maximum range extender off:
  – Press and hold the Max Range Hi/Lo
    button or change channels.
Lock Function
 The Lock function locks the Channel Up, Channel 
  Down, Volume Up, Volume Down and Mode/Power 
  buttons to prevent accidental operation. 
  To turn the lock on or off:
  – Press and hold the Lock/Lock button for 
    two seconds.
  A double beep sound is used to conrm your lock on 
 or off request. When in Lock mode, 
 the Lock icon will be displayed.
microTALK
®
 Range
Your range will vary depending on terrain and conditions.
  In at, open country your radio will 
  operate at maximum range.
  Buildings and foliage in the path of the 
  signal can reduce the range of the radio.
  Dense foliage and hilly terrain will further 
  reduce the range of the radio.
  On Channels 8 through 14, your radio   
  automatically switches to low power, which 
  will limit the range the radio can communicate.
Insert Batteries
Radio Charger Jack
Staying in touch with your family and friends is convenient 
and easy when using your microTALK
®
 radio. Some of the 
many uses you will discover include:
Communicating with others while hiking, biking, and working; keeping track of 
family and friends at a crowded public event; checking with travel companions 
in another car; talking with neighbors; arranging meeting spots with others 
while shopping at the mall.
Secure your microTALK
®
 radio while on 
the go.
Carrying your microTALK
®
 radio with you is easy when 
using the belt clip or optional wrist strap.
The belt clip easily attaches to your belt, purse, or 
backpack.
Owner’s Manual
Introduction
Making Life Easier and Safer
Introduction
Product Features
Operation
Using Your Radio
Customer Assistance
Product Service & Support
Belt Clip
Backlit LCD Display
Features
• 22 Channels
• 10 Channel
  Weather Radio 
• Weather Alert
• 121 Privacy Codes  
  (38 CTCSS codes/
  83 DCS codes)
• Hands-Free Operation 
 (VOX)
• VibrAlert
®
  Silent Paging
• Scan
 Channels, 
  privacy codes
• Backlit LCD Display
• LED Flashlight
• Call Alert 
  Ten selectable 
 tones
• Button Lock
• Speaker/
 Microphone/ 
  Charge Jack
• Roger Beep 
  Selectable On/Off
• Battery/Power Saver 
• Keystroke Tones
• Battery Level 
 Indicator
• Low Battery 
  Audible Alert
• Auto Squelch
• Maximum 
  Range Extender
• Belt Clip
Printed in China
Part No. KEM-ML38402-04A
English
TWO-WAY RADIO MODEL 
ACXT545
Nothing Comes Close to a Cobra
®
For any questions about operating this new Cobra branded product, PLEASE 
CONTACT US FIRST… do not return this product to the retail store. The contact 
information for support will vary depending on the country in which you 
purchased and utilize the product. 
To obtain warranty service or other information for products purchased from 
Altis itself or through its authorized reseller or agent and utilized in the U.S.A., 
please call our consumer support line at (866) 721-3805, or email us at 
support@altistec.com. You will receive instructions on how to ship the 
products at your expense to an Altis Global Limited Authorized Service Center. 
To obtain service, you must include: (a) a copy of your receipt, bill of sale or 
other comparable proof of purchase; (b) a written description of the problem; 
and, most importantly; (c) your address and telephone number.
For warranty and customer service information outside the US, please contact 
your local dealer.
For further information needed on its features, please visit 
www.cobrawalkietalkie.com for frequently     
asked questions and the electronic manual.
A-1 A-2 A-3 1 2
Remove Belt Clip
Pull Up Lock Latch
Caring for Your microTALK
®
 Radio   
Your microTALK
®
 radio will give you years of trouble-free service if cared 
for properly. Handle the radio gently. Keep the radio away from dust. 
Never put the radio in water or in a damp place. Avoid exposure to 
extreme temperatures.
Installing Batteries 
To install or replace batteries:
1. Remove belt clip by releasing belt clip 
  latch and sliding clip up.
2. Pull up on the battery door latch to remove the 
  battery compartment cover.
3. Insert the supplied three AA rechargeable   
  batteries or non-rechargeable alkaline batteries. 
  Position batteries according to polarity markings.
4. Replace battery compartment cover and 
  belt clip.
• Do not attempt to charge alkaline batteries.
• Do not mix old and new batteries.
• Do not mix alkaline, standard (carbon-zinc), or 
 rechargeable (Ni-Cd, Ni-MH, etc.) batteries.
To charge batteries in radio:
1. Check to see that the batteries have been   
  inserted properly. 
2. Insert the cable into the charge jack located at 
  the top of the radio. 
3. Plug the cable into USB-compatible power port.
Use only the supplied rechargeable batteries and charger for recharging 
your Cobra microTALK
®
 radio.
Cobra recommends your radio is turned off while being charged.
Non-rechargeable alkaline batteries can also be used in your radio.
3 4 5 6 7 8
Battery Low
Two Inches (5 cm) 
from Mouth
Battery Low   
  When battery power is low, the nal bar in the 
  Battery Low icon will blink and an audible tone will 
  sound twice before the radio shuts off. Your batteries 
  should be replaced or recharged, if using 
  rechargeable batteries. 
Auto Battery Save   
  If there are no transmissions within 10 seconds, the 
  radio will automatically switch to Battery Save mode 
  and the Power Saver icon will ash in the display. 
  This will not affect the radio’s ability to receive 
  incoming transmissions.
Communicating with Another Person 
  1. Press and hold the Talk button.
  2. With the microphone about two inches (5 cm) from 
    your mouth, speak in a normal voice.
  3. Release the Talk button when you are 
    nished talking and listen for a response.
  You cannot receive incoming calls while 
  pressing the Talk button.
To Select a Channel
  With the radio on, select any of the 22 channels by 
  pressing the Channel Up or Channel Down button. 
Both radios must be tuned to the 
same channel to communicate.
The radio will display ashing battery icon
while charging if the radio is on.
Both radios must be tuned to the 
same channel to communicate.
See page 17 for frequency
allocations charts.
Listening for a Response
  Release the Talk button to receive incoming   
  transmissions. Your microTALK
®
 radio is always 
 in Standby mode while the Talk or Call buttons 
  are not pressed.
To Adjust Volume
  Press the Volume Up or Volume 
 Down button.
  A double beep sound is used to indicate 
  the minimum and maximum volume levels 
  (1 through 8).
Call Button
  Press and release the Call button. 
  The other person will hear a three second call  
  tone. This tone is used only to establish voice 
 communications.
LED/S.O.S. Flashlight
  Press and release the LED ashlight button   
  below the TALK button to use the LED ashlight 
  located at the bottom of the radio.
  To activate S.O.S. function, press and hold the 
LED ashlight button to turn on. Press and release to turn off the 
ashlight or S.O.S. function.
Auto Squelch/Maximum Range
Your microTALK
®
 radio will automatically shut off weak transmissions 
and unwanted noise due to terrain, conditions or if you’ve reached 
your Maximum Range limit.
You can temporarily turn off auto squelch or turn on maximum range 
extender, allowing all signals to be received and extending the 
maximum range of your radio.
See page 12 on how to select between
ten call tone settings.
Remember, you can achieve maximum
range by using maximum range extender.
See page 4 for details.
Scrolling Through the Mode Function
By scrolling through the Mode function, you will be able to 
select or turn on preferred features of your microTALK
®
 radio. When
scrolling through the Mode function, your radio features 
will be displayed in the same predetermined order:
Set CTCSS Privacy Codes
Set DCS Privacy Codes
Set Vox On/Off 
Set Vox Sensitivity
Set Call Tones 1-10 
Set VibrAlert On/Off
Set Roger Beep On/Off
Set Key Tones On/Off
Privacy Codes
Your microTALK
®
 radio incorporates two advanced coded squelch
systems that can help to reduce interference from other users 
on any given channel. CTCSS (Continuous Tone Coded Squelch
System) provides 38 privacy codes and DCS (Digitally Coded Squelch)
provides 83 privacy codes. This provides a total of 121 Privacy
Codes. Either system can be used on all channels, but both systems
cannot be used on the same channel at the same time.
To successfully communicate using a privacy code, both 
the sending and receiving radios must be tuned to the same
channel and to the same privacy code system (CTCSS or DCS)
and privacy code number. Each channel will remember the
last privacy code system and number you select.
The privacy code 00 is not a privacy code, but allows all
signals to be heard on a channel that is set to 00 on both
the CTCSS and DCS systems.
©2018 Altis Global Limited,
Atlanta, GA USA.
www.cobrawalkietalkie.com
Mode Functions (continued on back side)
Maximum range may vary and is based on 
unobstructed line-of-sight communication 
under ideal conditions. 
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1
3
7
4
8
11
5
10
6
9
12
13
19
18
20
1. Antenna
2. External Speaker/
  Microphone/ USB Charge Jack
3. Mode/Power Button
4. Call/Lock Button
5. Channel Up/Down Buttons 
6. Backlit LCD Display 
7. Speaker/Microphone
8. Volume Up/Down Buttons
9. LED Light Button
10. Talk Button
11. Memory/Escape Button 
12. Max Range Hi/Lo Button
13. Scan Button
14. Wrist Strap Connection
15. Belt Clip
16. Battery Compartment
17. Battery Door Latch
18. Rubberized Grips
19. LED Flashlight
20. Weather Button
1.  Battery Level Indicator
2.  Roger Beep Icon
3.  VOX Icon
4.  Weather Icon
5.  Lock Icon
6.  Hi/Low Power Icon
7.  DCS/CTCSS Icons
8.  Scan/Memory Icon
9.  Weather Alert Icon
10. DCS/CTCSS Privacy Code Numbers
11. Power Saver Icon
12. Channel  Numbers
13. Receive/Transmit  Icon
14. Memory Channel Number
15. VibrAlert
®
 / Call Alert Icon
16. Key Tone Icon
1
2
3
4
5
6
11
12
13
10
8
7
9
14
15
16
Turning on Your microTALK
®
 Radio 
  Press and hold the Mode/Power button until you hear 
  a series of audible tones indicating the radio is on.
  Your microTALK
®
 radio is now in Standby mode, 
  ready to receive transmissions. The radio is always in 
  Standby mode except when the Talk, Call or  
  Mode/Power buttons are pressed.
Quick Start
1. Press and hold the Mode/Power button to turn on your radio.
2. Press the Channel Up or Channel Down button to select 
  a channel.
3. Press and hold the Talk button while 
  speaking into the microphone.
4. When nished talking, release the Talk 
  button and listen for a response.
Both radios must be tuned to the same
channel/privacy code to communicate.
For charging microTALK radio(s) in desktop charger:
1. Insert radio(s) into desktop charger as shown. 
2. Insert the micro-USB cable into jack on back of charger.
3. Plug the cable into USB-compatible power port. 
  For pluggable equipment, the socket-outlet shall be 
installed near the equipment and shall be easily accessible.
If charging light is not on, check position of radio. Radio should be 
upright. The charge indicator light will stay on as long as the radio is in 
the charging well, and the light will go off when the charging is complete.
Note: To charge a single radio, you can bypass the desktop charger and 
simply insert the micro-USB’s connector directly into the charge jack 
located on the top of the radio.
The radio will display ashing battery icon while charging.
Cobra recommends your radio be turned off while being charged.
Non-rechargeable alkaline batteries can also be used in your radio.
Mode/Power
Channel Button
Mode/Power
Light/Max Range
Volume Button
Call Button
Lock Button
Battery Save Mode
Talk Button
LED/S.O.S. Flashlight
Channel Number
Listening
Volume Level
Lock Icon
Operation
Mode Functions
Set CTCSS Privacy Codes
  To select a CTCSS privacy code:
  1. After selecting a channel, press 
   the Mode/Power button until the CTCSS icon
    appears and the small numbers next to the
    channel number ash on the display.
 2. Press using the Channel Up or Channel Down
    button to select a privacy code. You can hold the
 Up or Down button for fast advance.
  3. When your desired CTCSS privacy code is
    displayed, choose one of the following:
 a. Press the Mode/Power button to enter the
     new setting and proceed to other functions.
 b. Press the Talk or Call/Lock button to return to
     Standby mode.
 c. Do not press any buttons for 6 seconds 
     to return to Standby mode.
If DCS is turned on at the channel
selected, the display will ash the
CTCSS icon and “OFF.” To switch from 
DCS to CTCSS, press the Channel Up 
or Channel Down button while the display
is ashing “OFF.” The display will then
show the small numbers ashing and you
will then be able to proceed to step 2.
Set DCS Privacy Codes
  To select a DCS privacy code:
  1. After selecting a channel, press the Mode/Power
    button until the DCS icon appears and the small
    numbers ash on the display (00 through 83).
2. Press using the Channel Up or Channel Down button to select a DCS
  privacy code. You can hold the Up or Down button for fast advance.
3. When DCS privacy code is displayed, choose one of the following:
  a. Press the Mode/Power button to enter the new setting and
    proceed to other functions.
  b. Press the Talk or Call/Lock button to return to Standby mode.
  c. Do not press any buttons for 6 seconds to enter the new settings
    and to return to Standby mode.
If CTCSS is turned on at the channel selected, 
the display will ash the DCS icon and “OFF.” 
To switch from CTCSS to DCS, press the 
Channel Up or Channel Down button while 
the display is ashing “OFF.” The display will 
then show the small numbers ashing and 
you will then be able to proceed to step 2.
Privacy Code
Mode/Power
Mode/Power
Channel Button
Channel Button
DCS Privacy Code


