<s>
The	O
Surface	B-Device
Book	I-Device
2	I-Device
is	O
the	O
second	O
generation	O
of	O
the	O
Surface	B-Device
Book	I-Device
,	O
part	O
of	O
the	O
Microsoft	B-Device
Surface	I-Device
line	O
of	O
personal	O
computers	O
.	O
</s>
<s>
It	O
is	O
a	O
2-in-1	B-Device
PC	I-Device
which	O
can	O
be	O
used	O
like	O
a	O
conventional	O
laptop	O
,	O
or	O
the	O
screen	O
can	O
be	O
detached	O
and	O
used	O
separately	O
as	O
a	O
tablet	O
,	O
with	O
touch	O
and	O
stylus	O
input	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
13.5-inch	O
screen	O
available	O
in	O
the	O
original	O
Surface	B-Device
Book	I-Device
introduced	O
two	O
years	O
before	O
,	O
it	O
is	O
also	O
available	O
in	O
a	O
15-inch	O
screen	O
model	O
.	O
</s>
<s>
It	O
was	O
released	O
in	O
November	O
2017	O
,	O
and	O
replaced	O
in	O
Microsoft	O
's	O
product	O
line	O
by	O
the	O
Surface	B-Device
Book	I-Device
3	I-Device
in	O
May	O
2020	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
2	I-Device
features	O
a	O
full-body	O
magnesium	O
alloy	O
construction	O
.	O
</s>
<s>
The	O
device	O
comes	O
in	O
two	O
distinct	O
portions	O
:	O
a	O
tablet	O
that	O
contains	O
the	O
CPU	B-Device
,	O
storage	B-Device
,	O
wireless	O
connectivity	O
and	O
touchscreen	O
,	O
and	O
a	O
hardware	O
keyboard	O
base	O
that	O
contains	O
a	O
high-performance	O
mobile	O
GPU	B-Architecture
,	O
supported	O
by	O
its	O
own	O
active	O
cooling	O
system	O
.	O
</s>
<s>
The	O
device	O
contains	O
two	O
USB	O
3.0	O
Gen-1	O
ports	O
,	O
a	O
USB-C	O
port	O
,	O
3.5	O
mm	O
headphone	B-Device
jack	I-Device
,	O
full-sized	O
SD	B-Device
card	I-Device
slot	O
,	O
and	O
two	O
Surface	B-Device
Connect	O
ports	O
(	O
one	O
of	O
which	O
is	O
always	O
occupied	O
by	O
the	O
keyboard	O
base	O
for	O
communication	O
between	O
the	O
two	O
hardware	O
portions	O
,	O
unless	O
the	O
tablet	O
is	O
detached	O
from	O
the	O
base	O
)	O
.	O
</s>
<s>
From	O
a	O
hardware	O
perspective	O
,	O
this	O
device	O
marks	O
Microsoft	O
's	O
first	O
time	O
to	O
provide	O
USB-C	O
natively	O
in	O
any	O
Surface	B-Device
device	O
,	O
also	O
supporting	O
USB-C	O
Power	O
Delivery	O
.	O
</s>
<s>
It	O
was	O
the	O
only	O
Surface	B-Device
computer	O
equipped	O
with	O
USB-C	O
until	O
Microsoft	O
's	O
introduction	O
of	O
the	O
Surface	B-Device
Go	I-Device
,	O
in	O
August	O
2018	O
.	O
</s>
<s>
Surface	B-Device
Book	I-Device
2	I-Device
models	O
ship	O
with	O
a	O
pre-installed	O
64-bit	O
version	O
of	O
Windows	B-Operating_System
10	I-Operating_System
Pro	I-Operating_System
and	O
a	O
30-day	O
trial	B-License
of	O
Microsoft	B-Operating_System
Office	I-Operating_System
365	I-Operating_System
.	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	O
Edge	O
.	O
</s>
<s>
With	O
Windows	B-Operating_System
10	I-Operating_System
the	O
Tablet	O
mode	O
is	O
available	O
when	O
the	O
base	O
is	O
detached	O
from	O
the	O
device	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
2	I-Device
is	O
backward-compatible	B-General_Concept
with	O
all	O
accessories	O
of	O
its	O
direct	O
predecessors	O
,	O
such	O
as	O
the	O
Surface	B-Device
Dock	I-Device
,	O
Surface	B-Device
Dial	I-Device
and	O
Surface	B-Device
Pen	I-Device
.	O
</s>
<s>
The	O
device	O
's	O
native	O
pen	O
computing	O
capabilities	O
are	O
based	O
on	O
N-trig	B-Device
technology	O
Microsoft	O
acquired	O
in	O
2015	O
,	O
but	O
major	O
improvements	O
were	O
made	O
to	O
reduce	O
input	O
latency	O
,	O
add	O
tilt	O
support	O
,	O
and	O
capture	O
up	O
to	O
4096	O
levels	O
of	O
pressure	O
sensitivity	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
2	I-Device
received	O
broadly	O
positive	O
reviews	O
,	O
often	O
compared	O
favorably	O
to	O
Apple	O
's	O
MacBook	B-Device
Pro	I-Device
lineup	O
.	O
</s>
<s>
Most	O
reviews	O
applauded	O
the	O
Surface	B-Device
Book	I-Device
2	I-Device
's	O
keyboard	O
for	O
offering	O
a	O
class-leading	O
1.55	O
mm	O
of	O
key	O
travel	O
,	O
significant	O
performance	O
improvement	O
,	O
well-controlled	O
thermals	O
,	O
and	O
new	O
hinge	O
-	O
now	O
redesigned	O
and	O
built	O
as	O
one	O
singular	O
component	O
that	O
increased	O
device	O
rigidity	O
,	O
improved	O
overall	O
docking	O
reliability	O
,	O
and	O
reduced	O
screen	O
wobble	O
.	O
</s>
<s>
Other	O
improvements	O
include	O
an	O
improved	O
IR	O
camera	O
that	O
activates	O
faster	O
and	O
supports	O
enhanced	O
anti-spoofing	O
Windows	O
Hello	O
facial	O
recognition	O
,	O
a	O
faster	O
solid-state	B-Device
drive	I-Device
with	O
full	O
drive	O
encryption	O
from	O
first-boot	O
,	O
a	O
built-in	O
TPM	O
chip	O
,	O
and	O
two	O
new	O
cooling	O
systems	O
(	O
for	O
the	O
CPU	B-Device
and	O
GPU	B-Architecture
)	O
that	O
produce	O
less	O
high-pitched	O
noise	O
.	O
</s>
<s>
Devindra	O
Hardawar	O
of	O
Engadget	O
said	O
of	O
the	O
15-inch	O
model	O
,	O
"	O
The	O
Surface	B-Device
Book	I-Device
2	I-Device
is	O
exactly	O
what	O
we	O
've	O
wanted	O
from	O
a	O
high-end	O
Microsoft	O
laptop	O
.	O
</s>
<s>
Hardawar	O
also	O
directly	O
compared	O
the	O
Surface	B-Device
Book	I-Device
2	I-Device
to	O
Apple	O
's	O
Macbook	B-Device
Pro	I-Device
saying	O
,	O
"	O
It	O
's	O
the	O
closest	O
a	O
PC	O
maker	O
has	O
come	O
to	O
taking	O
on	O
the	O
MacBook	B-Device
Pro	I-Device
,	O
both	O
in	O
style	O
and	O
substance.	O
"	O
</s>
<s>
Tom	O
Warren	O
,	O
of	O
The	O
Verge	O
,	O
also	O
gave	O
the	O
Surface	B-Device
Book	I-Device
2	I-Device
positive	O
notice	O
,	O
praising	O
its	O
performance	O
,	O
keyboard	O
,	O
and	O
touchpad	O
.	O
</s>
<s>
The	O
Surface	B-Device
Book	I-Device
2	I-Device
faced	O
a	O
number	O
of	O
early	O
production	O
issues	O
when	O
it	O
was	O
first	O
launched	O
in	O
November	O
2017	O
,	O
including	O
defective	O
operating	O
system	B-Operating_System
images	I-Operating_System
,	O
split	O
key	O
caps	O
,	O
misaligned	O
hinges	O
,	O
overuse	O
of	O
adhesives	O
surrounding	O
the	O
tablet	O
screen	O
,	O
and	O
coil	O
whine	O
when	O
under	O
load	O
.	O
</s>
<s>
When	O
the	O
15-inch	O
Surface	B-Device
Book	I-Device
2	I-Device
is	O
set	O
to	O
"	O
Best	O
Performance	O
"	O
in	O
the	O
Windows	B-Operating_System
10	I-Operating_System
operating	O
system	O
power	O
settings	O
,	O
specific	O
scenarios	O
like	O
extensive	O
gaming	O
or	O
video	O
transcoding	O
could	O
lead	O
to	O
high	O
usage	O
across	O
both	O
the	O
CPU	B-Device
and	O
GPU	B-Architecture
,	O
and	O
cause	O
the	O
device	O
to	O
draw	O
over	O
105	O
W	O
of	O
power	O
.	O
</s>
