<s>
An	O
action	B-Device
camera	I-Device
or	O
action	B-Device
cam	I-Device
is	O
a	O
digital	B-Device
camera	I-Device
designed	O
for	O
recording	O
action	O
while	O
being	O
immersed	O
in	O
it	O
.	O
</s>
<s>
Action	B-Device
cameras	I-Device
are	O
therefore	O
typically	O
compact	O
,	O
rugged	O
,	O
and	O
waterproof	O
at	O
the	O
surface	O
level	O
.	O
</s>
<s>
They	O
typically	O
use	O
CMOS	B-Architecture
image	I-Architecture
sensors	I-Architecture
,	O
and	O
can	O
take	O
photos	O
in	O
burst	O
mode	O
and	O
time-lapse	O
mode	O
as	O
well	O
as	O
record	O
high-definition	O
video	O
(	O
as	O
of	O
2019	O
,	O
mid-range	O
to	O
high-end	O
action	B-Device
cameras	I-Device
can	O
record	O
4K	B-Architecture
video	I-Architecture
at	O
60	O
fps	O
)	O
.	O
</s>
<s>
Some	O
examples	O
of	O
common	O
places	O
to	O
mount	O
an	O
action	B-Device
camera	I-Device
are	O
on	O
a	O
hat	O
or	O
helmet	O
,	O
on	O
the	O
chest	O
,	O
or	O
on	O
the	O
handlebars	O
of	O
a	O
bike	O
or	O
similar	O
vehicle	O
.	O
</s>
<s>
An	O
action	B-Device
camera	I-Device
is	O
usually	O
designed	O
to	O
require	O
minimal	O
interaction	O
once	O
recording	O
has	O
begun	O
,	O
as	O
this	O
allows	O
continuous	O
capture	O
of	O
the	O
action	O
without	O
having	O
to	O
interact	O
with	O
the	O
camera	O
.	O
</s>
<s>
A	O
typical	O
action	B-Device
camera	I-Device
records	O
onto	O
a	O
micro	B-Device
SD	I-Device
card	I-Device
,	O
and	O
has	O
either	O
a	O
Micro-USB	O
or	O
a	O
USB-C	O
connector	O
.	O
</s>
<s>
Action	B-Device
cameras	I-Device
are	O
associated	O
with	O
outdoor	O
sports	O
,	O
and	O
,	O
often	O
attached	O
to	O
helmets	O
,	O
surfboards	O
or	O
handlebars	O
,	O
are	O
an	O
integral	O
part	O
of	O
many	O
extreme	O
sports	O
such	O
as	O
base	O
jumping	O
and	O
wingsuit	O
flying	O
.	O
</s>
<s>
The	O
category	O
is	O
commonly	O
associated	O
with	O
the	O
GoPro	B-Device
range	O
of	O
cameras	O
,	O
and	O
many	O
action	B-Device
cameras	I-Device
come	O
with	O
a	O
GoPro	B-Device
mount	O
adapter	O
to	O
take	O
advantage	O
of	O
the	O
accessories	O
available	O
for	O
these	O
cameras	O
.	O
</s>
<s>
However	O
,	O
there	O
are	O
many	O
GoPro	B-Device
alternatives	O
which	O
are	O
entering	O
the	O
market	O
of	O
action	B-Device
cameras	I-Device
in	O
recent	O
times	O
.	O
</s>
<s>
In	O
2014	O
,	O
worldwide	O
action	B-Device
camera	I-Device
sales	O
increased	O
by	O
44	O
percent	O
from	O
the	O
previous	O
year	O
and	O
half	O
of	O
them	O
have	O
the	O
capability	O
to	O
shoot	O
Ultra	O
High	O
Definition	O
at	O
4K	B-Architecture
resolution	I-Architecture
.	O
</s>
<s>
Action	B-Device
camera	I-Device
sales	O
have	O
surpassed	O
traditional	O
camcorder	O
and	O
compact	O
camera	O
sales	O
,	O
and	O
it	O
is	O
predicted	O
that	O
in	O
2019	O
,	O
action	B-Device
camera	I-Device
sales	O
will	O
surpass	O
all	O
types	O
of	O
cameras	O
due	O
to	O
the	O
sales	O
of	O
other	O
camera	O
types	O
declining	O
or	O
stabilizing	O
.	O
</s>
<s>
By	O
2021	O
,	O
the	O
Ultra	O
HD	B-Device
category	O
of	O
the	O
action	B-Device
camera	I-Device
market	O
is	O
expected	O
to	O
reach	O
$3.3	O
billion	O
.	O
</s>
<s>
The	O
Full	O
HD	B-Device
category	O
,	O
meanwhile	O
,	O
is	O
expected	O
to	O
reach	O
$2.2	O
billion	O
,	O
with	O
the	O
surveillance/security	O
industry	O
driving	O
growth	O
.	O
</s>
<s>
In	O
2018	O
Sony	O
launched	O
a	O
shock	O
and	O
waterproof	O
camera	O
with	O
a	O
1	O
"	O
sensor	O
in	O
a	O
body	O
size	O
similar	O
to	O
an	O
action	B-Device
camera	I-Device
.	O
</s>
<s>
However	O
,	O
Sony	O
is	O
not	O
marketing	O
it	O
as	O
an	O
action	B-Device
camera	I-Device
;	O
rather	O
,	O
as	O
a	O
video	O
professional	O
camera	O
with	O
the	O
capability	O
to	O
shoot	O
with	O
up	O
to	O
15	O
cameras	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
Besides	O
the	O
GoPro	B-Device
line	O
,	O
other	O
models	O
of	O
action	B-Device
cams	I-Device
include	O
the	O
:	O
</s>
