I A S U S _ E A R 3 M K 2 _ O P E R AT I N G I N S T R U C T I O N S _ v 1 _ 2 0 2 0
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B O O S T I N G V O L U M E
A N D S A V I N G B A T T E R Y L I F E
C H A R G I N G T H E E A R 3 M K 2
The EAR3MK2 is powered by an internal,
non-removable lithium-ion battery. It is pre-charged,
enabling the EAR3MK2 to be ready for use right out
of the box.
When charging is required, connect the included
charging cable (D) to the input jack (3) at the bottom
of the unit and the other end to a computer USB
port.
When charging, the Charging Indicator LED (7) is lit
red and will turn off when charging completed.
A full charge can be completed in about 3 hours
when charged using a computer’s USB port (0.5A
output). Each charge allows for usage of up to 20
hours, depending on the output volume level and
ambient temperature.
To prolong the life of the battery cells, IASUS does
not recommend charging the EAR3MK2 using high
output USB chargers (ie. 1.0A, 2.1A, etc).
Note:
If the EAR3MK2 will not be used for a prolonged period, fully charge the unit before storing
to prevent permanent damage to the battery.
One of the EAR3MK2’s main features is amplifying
your audio source’s signals to higher and sufficient
levels for your headphones, earphones, etc. This
results in the fuller and richer sound one comes to
expect from IASUS portable amplifiers.
Another main feature is conserving the power on
your audio source (smartphone, music player...)
Example:
Lowering the volume on your phone
and turning up the EAR3MK2 will allow you
to achieve the same desired volume while
saving your phone’s battery power.
WARNING:
Do not turn the volume up too
high on the EAR3MK2. It have the potential
to damage headphones, earphones, helmet
speakers, etc., should they not be rated
for a higher audio input. Use the volume
amplification slowly and proceed with caution
to avoid over boosting your headphones,
earphones, helmet speakers, etc., but most
importantly, to avoid permanently damaging
your hearing.
!
!
Use only the included IASUS charging
cable. Using any other charging cable
may cause permanent damage to the
EAR3MK2 amp.
