<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
the	O
fourth-generation	O
Surface-series	O
2-in-1	O
detachable	O
,	O
designed	O
,	O
developed	O
,	O
marketed	O
,	O
and	O
produced	O
by	O
Microsoft	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
was	O
announced	O
on	O
October	O
6	O
,	O
2015	O
alongside	O
the	O
Surface	B-Device
Book	I-Device
.	O
</s>
<s>
In	O
the	O
U.S.	O
and	O
Canada	O
,	O
the	O
Surface	B-Device
Pro	I-Device
4	I-Device
was	O
released	O
on	O
October	O
26	O
,	O
2015	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
an	O
update	O
over	O
its	O
predecessor	B-Device
,	O
featuring	O
Skylake	B-Architecture
CPUs	B-Device
,	O
more	O
RAM	B-Architecture
and	O
SSD	B-Device
options	O
and	O
a	O
12.3-inch	O
display	O
with	O
a	O
greater	O
resolution	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
the	O
device	O
is	O
compatible	O
with	O
most	O
of	O
its	O
predecessor	B-Device
's	O
accessories	O
.	O
</s>
<s>
The	O
device	O
's	O
successor	O
,	O
the	O
2017	B-Device
Surface	I-Device
Pro	I-Device
,	O
was	O
announced	O
in	O
May	O
2017	O
,	O
ahead	O
of	O
a	O
release	O
the	O
following	O
month	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
was	O
announced	O
on	O
October	O
6	O
,	O
2015	O
alongside	O
the	O
Surface	B-Device
Book	I-Device
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
the	O
same	O
size	O
as	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
,	O
but	O
has	O
a	O
thinner	O
screen	O
bezel	O
which	O
allows	O
for	O
a	O
display	O
of	O
a	O
slightly	O
greater	O
size	O
of	O
.	O
</s>
<s>
The	O
screen	O
resolution	O
is	O
also	O
greater	O
than	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
's	O
,	O
at	O
2736x1824	O
at	O
267	O
PPI	B-Algorithm
,	O
with	O
the	O
same	O
aspect	B-General_Concept
ratio	I-General_Concept
of	O
3:2	O
and	O
10-point	O
multi-touch	B-Application
.	O
</s>
<s>
The	O
chassis	O
is	O
thinner	O
and	O
lighter	O
than	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
.	O
</s>
<s>
All	O
Surface	B-Device
Pro	I-Device
4	I-Device
models	O
feature	O
6th-generation	O
Skylake	B-Architecture
Intel	B-Device
Core	I-Device
processors	O
—	O
m3	O
,	O
i5	O
or	O
i7	O
—	O
which	O
are	O
more	O
powerful	O
and	O
run	O
cooler	O
over	O
its	O
Intel	B-Device
Core	I-Device
Haswell	B-Device
predecessors	O
found	O
in	O
the	O
Surface	B-Device
Pro	I-Device
3	I-Device
and	O
2	O
.	O
</s>
<s>
The	O
maximum	O
clock	O
rate	O
of	O
the	O
most	O
powerful	O
CPU	B-Device
option	O
(	O
i7-6650U	O
)	O
is	O
also	O
greater	O
at	O
2.2	O
GHz	O
,	O
with	O
up	O
to	O
3.4GHz	O
in	O
the	O
Turbo	B-Device
Boost	I-Device
mode	O
.	O
</s>
<s>
The	O
m3-powered	O
model	O
is	O
completely	O
fanless	B-Application
.	O
</s>
<s>
RAM	B-Architecture
and	O
SSD	B-Device
options	O
available	O
are	O
4GB	O
,	O
8GB	O
,	O
16GB	O
and	O
128GB	O
,	O
256GB	O
,	O
512GB	O
,	O
1TB	O
respectively	O
;	O
the	O
top	O
options	O
are	O
twice	O
as	O
capacious	O
compared	O
to	O
top	O
options	O
of	O
the	O
Surface	B-Device
Pro	I-Device
4	I-Device
's	O
two	O
recent	O
predecessors	O
.	O
</s>
<s>
The	O
common	O
traits	O
,	O
inherited	O
from	O
the	O
previous-generation	O
Surface	B-Device
Pro	I-Device
3	I-Device
,	O
are	O
a	O
continuous	O
kickstand	O
,	O
magnesium	O
casing	O
with	O
a	O
silver-colored	O
back	O
side	O
,	O
802.11a/b/g/n/ac	O
Wi-Fi	O
radio	O
,	O
Bluetooth	B-Protocol
4.0	O
Low	O
Energy	O
,	O
full-size	O
USB	O
3.0	O
port	O
,	O
microSD	O
card	O
reader	O
,	O
headset	O
jack	O
,	O
Mini	B-Protocol
DisplayPort	I-Protocol
,	O
Cover	O
Port	O
,	O
and	O
a	O
renamed	O
SurfaceConnect	O
,	O
a	O
port	O
on	O
the	O
side	O
to	O
connect	O
a	O
wall	O
charger	O
,	O
Docking	O
Station	O
or	O
Surface	B-Device
Dock	O
accessories	O
.	O
</s>
<s>
All	O
Surface	B-Device
Pro	I-Device
4	I-Device
models	O
come	O
with	O
a	O
64-bit	O
version	O
of	O
Windows	B-Operating_System
10	I-Operating_System
Pro	I-Operating_System
and	O
a	O
Microsoft	B-Application
Office	I-Application
30-day	O
trial	O
.	O
</s>
<s>
Windows	B-Operating_System
10	I-Operating_System
comes	O
pre-installed	O
with	O
Mail	O
,	O
Calendar	O
,	O
People	O
,	O
Xbox	O
(	O
app	O
)	O
,	O
Photos	O
,	O
Movies	O
and	O
TV	O
,	O
Groove	O
,	O
and	O
Microsoft	B-Application
Edge	I-Application
.	O
</s>
<s>
With	O
Windows	B-Operating_System
10	I-Operating_System
,	O
a	O
"	O
Tablet	O
mode	O
"	O
is	O
available	O
when	O
the	O
Type	O
Cover	O
is	O
detached	O
from	O
the	O
device	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
backward	B-General_Concept
compatible	I-General_Concept
with	O
all	O
accessories	O
of	O
its	O
predecessor	B-Device
.	O
</s>
<s>
At	O
the	O
Windows	B-Operating_System
10	I-Operating_System
Devices	O
Event	O
on	O
October	O
6	O
,	O
2015	O
,	O
alongside	O
new	O
Surface	B-Device
2-in-1s	O
,	O
new	O
accessories	O
were	O
announced	O
.	O
</s>
<s>
The	O
Surface	B-Device
Dock	O
is	O
a	O
redesigned	O
docking	O
accessory	O
in	O
a	O
brick	O
form	O
factor	O
.	O
</s>
<s>
It	O
is	O
compatible	O
with	O
all	O
past	O
and	O
future	O
Surface	B-Device
models	O
with	O
a	O
SurfaceConnect	O
side	O
port	O
,	O
previously	O
used	O
to	O
connect	O
a	O
wall	O
charger	O
or	O
Docking	O
Station	O
accessory	O
:	O
Surface	B-Device
Pro	I-Device
3	I-Device
,	O
4	O
and	O
Surface	B-Device
Book	I-Device
.	O
</s>
<s>
The	O
Surface	B-Device
Dock	O
will	O
have	O
2	O
Mini	B-Protocol
DisplayPorts	I-Protocol
,	O
1	O
Gigabit	O
Ethernet	O
,	O
4	O
USB	O
3.0	O
,	O
and	O
1	O
audio	O
out	O
ports	O
.	O
</s>
<s>
Although	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
backward	B-General_Concept
compatible	I-General_Concept
with	O
Type	O
Cover	O
accessory	O
of	O
Surface	B-Device
Pro	I-Device
3	I-Device
,	O
an	O
attachable	O
keyboard	O
which	O
doubles	O
as	O
a	O
screen	O
protector	O
,	O
the	O
Surface	B-Device
Pro	I-Device
4	I-Device
Type	O
Cover	O
has	O
been	O
announced	O
with	O
and	O
without	O
a	O
fingerprint	B-Algorithm
ID	O
sensor	O
.	O
</s>
<s>
The	O
new	O
Type	O
Cover	O
is	O
thinner	O
and	O
lighter	O
than	O
its	O
predecessor	B-Device
,	O
has	O
improved	O
magnetic	O
stability	O
for	O
lap	O
use	O
,	O
a	O
mechanical	O
keyboard	O
with	O
improved	O
key	O
spacing	O
,	O
as	O
well	O
as	O
a	O
larger	O
touchpad	B-Application
.	O
</s>
<s>
An	O
updated	O
version	O
of	O
Surface	B-Device
Pen	I-Device
is	O
included	O
with	O
the	O
Surface	B-Device
Pro	I-Device
4	I-Device
,	O
which	O
has	O
1024	O
levels	O
of	O
pressure	O
sensitivity	O
and	O
is	O
heavier	O
with	O
a	O
rubberized	O
tip	O
.	O
</s>
<s>
There	O
is	O
an	O
eraser	O
on	O
the	O
end	O
that	O
doubles	O
as	O
a	O
button	O
,	O
which	O
may	O
perform	O
different	O
tasks	O
,	O
like	O
opening	O
the	O
OneNote	B-Application
app	O
or	O
activating	O
Cortana	B-Application
,	O
and	O
can	O
be	O
customized	O
using	O
the	O
Surface	B-Device
App	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
is	O
known	O
to	O
have	O
wide	O
spread	O
flicker	O
issues	O
with	O
the	O
display	O
named	O
as	O
Flickergate	O
after	O
the	O
independent	O
website	O
which	O
was	O
set	O
up	O
by	O
the	O
affected	O
users	O
after	O
getting	O
no	O
fix	O
from	O
Microsoft	O
.	O
</s>
<s>
"	O
We	O
are	O
aware	O
that	O
some	O
customers	O
have	O
experienced	O
a	O
screen	O
flicker	O
on	O
Surface	B-Device
Pro	I-Device
4	I-Device
and	O
are	O
monitoring	O
the	O
situation	O
closely	O
.	O
</s>
<s>
This	O
seems	O
to	O
be	O
a	O
common	O
issue	O
across	O
the	O
Surface	B-Device
series	O
,	O
with	O
a	O
sudden	O
death	O
to	O
the	O
Type	O
Cover	O
.	O
</s>
<s>
The	O
Surface	B-Device
Pro	I-Device
4	I-Device
received	O
generally	O
positive	O
reviews	O
from	O
technology	O
critics	O
.	O
</s>
<s>
Most	O
praise	O
a	O
sharper	O
and	O
larger	O
display	O
compared	O
to	O
the	O
one	O
found	O
in	O
the	O
predecessor	B-Device
,	O
redesigned	O
cooling	O
system	O
,	O
improved	O
technical	O
specifications	O
,	O
and	O
an	O
improved	O
Type	O
Cover	O
.	O
</s>
<s>
The	O
common	O
disadvantages	O
found	O
by	O
reviewers	O
were	O
that	O
the	O
Type	O
Cover	O
is	O
still	O
a	O
separate	O
purchase	O
,	O
the	O
relatively	O
modest	O
performance	O
of	O
the	O
Intel	B-Device
Core	I-Device
m3	O
chip	O
,	O
and	O
modest	O
battery	O
life	O
.	O
</s>
