4.
The
battery
life
on
the
BT
‐
2
will
vary
depending
on
the
device
you
are
using.Some
devices
draw
significantly
more
power
than
others.
In
particular,
using
the
BT
‐
2
with
aVoIP
application
such
as
Skype
will
drain
the
battery
more
quickly.
5.
Makesure
the
BT
‐
2
is
fully
charged
before
using
it
for
the
first
time.
6.
Repeated
charging
and
discharging
of
the
headset
over
time
will
causethe
batteryperformance
to
diminish.
This
is
normal
for
all
rechargeablebatteries.
Procedure:
1.
Plug
the
supplied
USB
cable
into
a
spare
USB
socket
on
your
computer
or
attach
it
to
your
AC
adapter.
2.
Then
plug
the
other
end
of
the
USB
cable
into
your
headphones.
3.
Duringcharging,
the
indicator
light
will
turn
red.
Ifcharging
does
not
begin,
unplug
the
travel
adapterand
plug
it
in
again.
4.
When
the
headset
is
fully
charged,
the
redindicator
light
changes
to
blue.Disconnect
the
AC
adapter
and
USB
cable.
LED
Status
Red
Light=Charging
Blue
Light=Fullycharged
Blinking
Red
Light=Under
15
minutes
of
playback
remaining
Blinking
Blue
Light=Normal
use
Blinking
Blue/Red
Light=Paring
Note:
Some
smart
devices
provide
additional
battery
status
feedback
via
an
on
‐
screen
icon.
Technical
Specification
Mylar
thickness
titanium
diaphragm
6
μ
Impedance
16
Ω±
20%
(DCR)
Rating
input
power
3mW
Maximum
input
power
5mW
Output
S.P.L(Sensitivity)
104
±
4dB
at
1KHz
with
126m
Vrms
input
R/L
output
difference
<3dB
at
1kHz
1mW
Distortion
≤
5%
at
1kHz/
input
Voltage=126mV
Frequency
response
20~22,000Hz
Buzzes
&
rattles
Must
be
normal
at
sin
wave
0.283v
(50
‐
20000ha)
Working
voltage
<10V
Current
consumption
<0.5mA
Signal/noise
ratio
>60dB
Bluetooth
version
4.1
Weight
13.0g
±
2g
Operating
range
Up
to
33
feet
(10
meters)
