INSTRUCTION FOR USE
Hold down POWER button
approx. 2 seconds until RED
LED turns on. Then release
button.
RED LED will remain on at a
lower intensity if your unit
hears other unit(s) in the
same group; otherwise the
RED LED will be extra bright.
04
TURN ON
Hold down POWER button
approx. 2 seconds until RED
LED flashes 3 times. Then
release button.
All LEDs are off in power
down mode except battery
charging indicator.
TURN OFF
Press UP button to move up
one level at a time until
desired level.
GREEN LED flashes once
unless maximum level is reached.
There are 6 volume levels.
VOLUME
UP
Press DOWN button to move
down one level at a time until
desired level.
GREEN LED flashes once
unless minimum level is
reached.
VOLUME
DOWN
Press AUX button until
GREEN LED flashes 3 times.
Continuous slow blinking of
RED LED indicates microphone
being muted. When microphone
is muted, other Yapalong units
cannot hear you but you can
hear the others.
MIC MUTE
Press AUX button until
GREEN LED flashes 3 times.
RED LED slow blinking stops.
Back to normal operation.
MIC
REACTIVATE
Hold down AUX button then
press UP button to move up
one level at a time until
desired level.
GREEN LED flashes twice
unless maximum level is
reached. Increase microphone
sensitivity if you want to speak
softly in a quiet environment.
There are 5 sensitivity levels.
INCREASE
MIC
SENSITIVITY
Hold down AUX button then
press DOWN button to move
down one level at a time until
desired level.
GREEN LED flashes twice
unless minimum level is
reached. Decrease
microphone sensitivity when
background noise is loud.
Speak closer to the
microphone to compensate.
DECREASE
MIC
SENSITIVITY
Press power button momentarily forces the unit to re-establish
sync with the rest of the group.
FORCE
SYNC
Up/Down
Button
Aux Button
MIC
sensitivity
MIC SENSITIVITY
ADJUSTMENT
FORCE SYNC TO RESUME
05
Solid red light
(extra bright)
Solid green light
Solid amber light
Slow blinking
amber light
Out of range indicator. Your unit cannot
receive RF signal from any unit in the
group. Power on other units, or move closer
to each other.
Battery is fully charged.
Battery is being charged.
1st battery low level warning
–Amber light blinks every 5 seconds.
2nd battery low level warning
–Amber light blinks every 2 seconds.
Then the unit turns off automatically.
After the radio is taken out of range and brought back into range, its
communication to the group will resume automatically. If the communication is
not resumed immediately, as indicated by extra bright red LED light, you may
press POWER button 1-3 seconds on this radio to force the sync. Restart the
radio is also a good way to resume the communication.
MIC sensitivity sets the minimum
level of sound loudness that the
microphone can pick up. The higher
MIC sensitivity is, the slighter sound
is picked up by the microphone.
Yapalong4000 MIC sensitivity is
divided into 5 levels. And the default
level is 4.
It is good practice to lower MIC
sensitivity in a noisy environment so
that other users will not hear so
much background noise.
Press Up/Down and AUX buttons simultaneously to adjust MIC sensitivity.
Be sure not to press AUX button alone, which will mute the radio.
LIGHT INDICATIONS
