MEI T78 User manual

User Manual
Handheld Walkie Talkies model T78
ENGLISH INSTRUCTION

1 Instruction For Use
These walkie talkies are communication devices which
operate on 462 MHZ. They come with 22 channels as well
as back-lit LCD screen, enabling you to communicate
over several kilometers free-of –charge (up to 6Km)
in open fields.
Note: Please read the user manual carefully before
using the equipment and retain for future consultation!
Specific Recommendations
If you carry any kind of personal medical device,
please consult a doctor before use.
To avoid the risk of burns, do not use the device
if the aerial is damage in any way.
Don not use the device in a potentially explosive
setting(e.g. Around pumps, on the lower deck of a boat
or around a fuel-storage installation or chemical products.
Switch off the device if on an airplane or in a hospital.
Remove the batteries if the device is not use for an
extended period of time. Never mix used and new batteries.
Position the transmitter and antenna at least 5cm from
your face. Direct the antenna upwards and speak normally.
This devices are not waterproof, please keep the devices dry.
Do not modify the device in any way. In the event of
damage occurring, ensure that the device us checked by
a qualified professional.
The device cannot be used to contact in emergency services.

2 Key Functions
3 Before Use the device
3.1 Removing the belt clip
Before insert batteries into the device, first remove the belt
clip latch away from the device.
3.2 Installing the Batteries
1, Slid down the battery compartment cover.
2, Insert 4* AAA Alkaline each walkie talkie(Not included)
3, Position the batteries according to the polarity making
on the battery compartment.
4, After placing batteries into correct positions, replace
the battery cover.

4 Using the device
4.1 Turning the device on/off
Switch on the device: Press and hold on the 2 seconds
then you will hear a beep sound.
Switch off the device: Press and hold on the 3 seconds
then you will hear a beep sound.
4.2 Adjusting the volume
To increase the volume, press the Up ▲button. And press
the Down ▼button to decrease the volume.
Note: The volume level is display on the screen.
4.3 Low Battery Indication
The device can detect the low battery level when the battery
voltage goes low. When battery voltage is low, the battery
icon will flash and a beep will be heard to indicate that the
batteries need to be replaced.
4.4 Receiving/transmitting communications:
The devices are in “Reception” mode when it is turned ON
and no transmitting. When a signal is received on the current
channel, the LCD will display in reception.
When you press the TALK (push to talk) button, the devices
switches to “Transmission” mode.
Hold the device in a vertical position with the microphone
3-5cm away from your mouth. While holding the TALK
button, speak into the microphone in a normal tone of voice.
Release the TALK button when you have finished transmitting.
For others to receive your transmission, they must be on
the same channel with you.
Note: 1, The talking range will depend on your surroundings
and environment. It will be affected by obstructions such
as hills or buildings.
2, Don’t try to use two devices which are less than 1.5m
(5 feets) apart. Otherwise, you may experience interference.

4.5 Changing Channels
Press the MENU button one time, the channel number will
Flash on the display.
Press the up▲/down▼button to change the channel.
Press the TALK button to confirm and return to stand-by mode.
Note: if no button is pressed within 10 seconds during
setting, the device will return to stand-by mode.
4.6 CTCSS and DCS Sub Codes
Press the MENU button twice, the current sub code will flash
on the display. Press the up ▲/down▼button to change
the 99 available codes.
Press the TALK button to confirm and return to stand-by mode.
License free radio’s operating on the 400-470MHZ frequency
band, the device has 22 radio channels.
If there are many device users near you, there is a chance that
some of the users are operating on the same radio channel.
You are free to choose one of the 99 available sub-channels.
Due to filtering, these sub-channels will generally not be
audible so they will note disturb the communication.
4.7 VOX (Hands free function)
Press the MENU button three times, the current VOX setting
will flash on the display and the VOX icon will display,
Press UP▲button to set the VOX sensitivity level between
1 and 3 level(level 3 is the high sensitive level).
Press down▼button until “OF” appears on the display to
turn VOX OFF.
Press the TALK button to confirm and return to stand-by mode.
In VOX mode, the radio will transmit a signal when it is
activated by your voice or other sound around you.
VOX Operation is not recommended if you plan to use your
device in a noisy or windy environment.
Note: VOX mode will be over ride when you press the TALK
button.

4.8 Scanning for an active radio channel
Press the Scan button: The “SCAN”function indicator
will appear on the display and the channel will scan
continuously. Once an active channel is found, the
scanning will stop and you can listen to the transmission.
When the transmission is on the found channel stop, the
scanning will resume automatically.
Note: If you press TALK button while listening to a found
channel, the device will go back to stand-by mode
on the found channel.
4.9 Monitor
Press the MON button about 3 seconds to active monitor.
Release the MON button return to stand by mode.
4.10 Setting the Call tones
The device has 10 call tones.
Press the MENU button 4 times, “CA” is displayed and on
the current call tone.
Press the UP▲/Down▼button to change these 10 call
tones one by one.
Press the TALK button to confirm and return to stand-by mode.
4.11 Sending a call tone
Press the Call button one time quickly, the call tone will be
transmitted on the setting channel.
4.12 Key Tone On/Off
You can on/off the key tone when press the buttons.
Press the MENU button 5 times, “KO” will be displayed.
Press the UP▲/Down▼button disable the key tone ON/OFF.
Press The TALK button to confirm your selection and return
to the stand-by mode.

4.13 Roger Beep On/Off
After the TALK button released, the device will send out
roger beep to confirm that have stopped talking.
Press the MENU button 6 times, “RO” will be displayed.
Press the UP▲/Down▼button disable the roger beep ON/OFF.
Press The TALK button to confirm your selection and return
to the stand-by mode.
4.14 Backlit display
Press any button except for the light button to activate the
display back light. The back light will light on 10 seconds.
4.15 Earpiece connection
The device can be used with earpiece (If there is earpiece
packed together with the device).
The connector is located on the top of the device.
Insert the earpiece plug into the connector (2.5mm jack).
There is a “TALK” button on the earpiece that has the same
function as the TALK button on the device.
When you use the TALK button from the earpiece, you must
also use the microphone from the earpiece to talk.
Note: Do not connect other earpieces, it may damage
your device.
4.16 Battery saving function
When the device in stand-by mode 6 seconds, the economy
mode is automatically activated. This does not affect the
reception of transmission and the stand by mode is
automatically re-activated as soon as a signal is detected.
4.17 Built-in Flash light
Your device has a built-in flash light that can be used in
sending light signals or for our lighting needs.
4.18 Lock & Unlock the device
Press and hold MENU button for 3 seconds to lock the device.
Press and hold MENU button for 3 seconds to unlock the device.

5 Technical specifications
Frequency 462 MHZ
Channel number 22 channels
Sub-codes 99
Transmission Power ≤0.5Watts
Modulation type FM-F3E
Battery Type AAA Alkaline
Range In the City: 500~ 1 Km
Neighborhoods: 2~3 Km
Open Filed : 6 Km
6 FCC compliance statement
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Changes or modifications not expressly approved by
the party responsible for compliance could void the user’s
authority to operate the equipment.
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause
harmful interference to radio communications. However,
there is no guarantee that interference will not occur in
a particular installation.

If this equipment does cause harmful interference to
radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the
following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-- Consult the dealer or an experienced radio/TV technician for help.
FCC SAR statement
This equipment complies with FCC radiation exposure limits
set forth for an uncontrolled environment. End user must
follow the specific operating instructions for satisfying RF
exposure compliance. This transmitter must not be co-located
or operating in conjunction with any other antenna or transmitter.
The portable device is designed to meet the requirements
for exposure to radio waves established by the Federal
Communications Commission (USA). These requirements set
a SAR limit of 1.6 W/kg averaged over one gram of tissue. The
highest SAR value reported under this standard during
product certification for use when properly worn on the body.
7 Channel and Frequency (MHz)
USA/CANADA (22CHS)
Ch. Frequency
Ch. Frequency
Ch. Frequency
Ch. Frequency
1 462.5625
2 462.5875
3 462.6125
4 462.6375
5 462.6625
6 462.6875
7 462.7125
8 467.5625
9 467.5875
10 467.6125
11 467.6375
12 467.6625
13 467.6875
14 467.7125
15 462.5500
16 462.5750
17 462.6000
18 462.6250
19 462.6500
20 462.6750
21 462.7000
22 462.7250