<s>
The	O
iPad	B-Device
(	O
4th	O
generation	O
)	O
(	O
marketed	O
as	O
iPad	B-Device
with	I-Device
Retina	I-Device
display	I-Device
,	O
colloquially	O
referred	O
to	O
as	O
the	O
iPad	B-Device
4	I-Device
)	O
is	O
a	O
tablet	B-Device
computer	I-Device
produced	O
and	O
marketed	O
by	O
Apple	O
Inc	O
.	O
</s>
<s>
Compared	O
to	O
its	O
predecessor	O
,	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
,	O
the	O
fourth-generation	O
iPad	B-Device
maintained	O
the	O
Retina	B-Operating_System
Display	I-Operating_System
but	O
featured	O
new	O
and	O
upgraded	O
components	O
such	O
as	O
the	O
Apple	O
A6X	O
chip	O
and	O
the	O
Lightning	B-Architecture
connector	I-Architecture
,	O
which	O
was	O
introduced	O
on	O
September	O
12	O
,	O
2012	O
.	O
</s>
<s>
It	O
shipped	O
with	O
iOS	B-Operating_System
6	I-Operating_System
,	O
which	O
provides	O
a	O
platform	O
for	O
audio-visual	O
media	O
,	O
including	O
electronic	O
books	O
,	O
periodicals	O
,	O
films	O
,	O
music	O
,	O
computer	O
games	O
,	O
presentations	O
and	O
web	O
content	O
.	O
</s>
<s>
Like	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
it	O
replaced	O
,	O
it	O
was	O
supported	O
by	O
five	O
major	O
iOS	B-Operating_System
releases	O
,	O
in	O
this	O
case	O
iOS	B-Operating_System
6	I-Operating_System
,	O
7	O
,	O
8	O
,	O
9	O
,	O
and	O
10	O
.	O
iOS	B-Operating_System
11	I-Operating_System
,	O
which	O
was	O
released	O
on	O
September	O
19	O
,	O
2017	O
,	O
does	O
not	O
support	O
the	O
fourth-generation	O
iPad	B-Device
as	O
that	O
update	O
does	O
not	O
support	O
32-bit	O
devices	O
and	O
apps	O
.	O
</s>
<s>
It	O
was	O
announced	O
at	O
a	O
media	O
conference	O
on	O
October	O
23	O
,	O
2012	O
as	O
the	O
fourth	O
generation	O
of	O
the	O
iPad	B-Device
line	O
,	O
and	O
was	O
first	O
released	O
on	O
November	O
2	O
,	O
2012	O
,	O
in	O
35	O
countries	O
,	O
and	O
then	O
through	O
December	O
in	O
ten	O
other	O
countries	O
including	O
China	O
,	O
India	O
and	O
Brazil	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
received	O
positive	O
reviews	O
and	O
was	O
praised	O
for	O
its	O
hardware	O
improvements	O
as	O
well	O
as	O
the	O
Retina	B-Operating_System
display	I-Operating_System
,	O
which	O
was	O
also	O
featured	O
in	O
the	O
device	O
's	O
predecessor	O
.	O
</s>
<s>
Furthermore	O
,	O
benchmarks	O
reveal	O
that	O
the	O
fourth-generation	O
iPad	B-Device
is	O
able	O
to	O
perform	O
CPU-reliant	O
tasks	O
twice	O
as	O
fast	O
as	O
its	O
predecessor	O
.	O
</s>
<s>
During	O
the	O
first	O
weekend	O
of	O
sales	O
,	O
an	O
aggregated	O
amount	O
of	O
3	O
million	O
fourth-generation	O
iPads	B-Device
and	O
iPad	B-Device
Minis	I-Device
were	O
sold	O
.	O
</s>
<s>
Rumors	O
regarding	O
the	O
next-generation	O
iPad	B-Device
emerged	O
shortly	O
after	O
the	O
release	O
of	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
.	O
</s>
<s>
At	O
that	O
point	O
some	O
speculated	O
that	O
the	O
next	O
iPad	B-Device
released	O
would	O
be	O
of	O
a	O
smaller	O
size	O
.	O
</s>
<s>
Further	O
speculations	O
emerged	O
in	O
July	O
2012	O
when	O
DigiTimes	O
,	O
with	O
the	O
help	O
of	O
unspecified	O
sources	O
,	O
claimed	O
that	O
Apple	O
made	O
small	O
revisions	O
to	O
the	O
then	O
upcoming	O
iPad	B-Device
and	O
scheduled	O
its	O
release	O
for	O
late	O
2012	O
.	O
</s>
<s>
The	O
company	O
did	O
not	O
pre-disclose	O
the	O
subject	O
of	O
the	O
event	O
,	O
but	O
it	O
was	O
widely	O
expected	O
to	O
be	O
regarding	O
the	O
iPad	B-Device
Mini	I-Device
.	O
</s>
<s>
Photographic	O
images	O
of	O
the	O
device	O
's	O
dock	O
connector	O
and	O
front	O
camera	B-Protocol
emerged	O
shortly	O
before	O
the	O
media	O
event	O
.	O
</s>
<s>
At	O
the	O
media	O
event	O
,	O
Apple	O
CEO	O
Tim	O
Cook	O
introduced	O
a	O
new	O
version	O
of	O
iBooks	B-Application
and	O
new	O
generations	O
of	O
the	O
MacBook	B-Device
Pro	I-Device
,	O
Mac	B-Device
Mini	I-Device
,	O
and	O
the	O
iMac	B-Device
before	O
unveiling	O
the	O
fourth-generation	O
iPad	B-Device
and	O
the	O
lower-end	O
iPad	B-Device
Mini	I-Device
.	O
</s>
<s>
During	O
the	O
unveiling	O
,	O
Apple	O
stated	O
that	O
the	O
fourth-generation	O
iPad	B-Device
would	O
be	O
available	O
to	O
pre-order	O
online	O
in	O
a	O
selected	O
number	O
of	O
countries	O
starting	O
October	O
26	O
.	O
</s>
<s>
The	O
release	O
of	O
the	O
fourth-generation	O
iPad	B-Device
led	O
to	O
the	O
discontinuation	O
of	O
its	O
predecessor	O
,	O
which	O
angered	O
many	O
third-generation	B-Operating_System
iPad	I-Operating_System
users	O
.	O
</s>
<s>
ITProPortal	O
noted	O
that	O
,	O
since	O
the	O
price	O
of	O
both	O
models	O
is	O
identical	O
,	O
consumers	O
that	O
purchased	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
within	O
this	O
time	O
frame	O
were	O
effectively	O
allowed	O
to	O
exchange	O
their	O
discontinued	O
device	O
for	O
the	O
fourth-generation	O
model	O
.	O
</s>
<s>
On	O
January	O
29	O
,	O
2013	O
,	O
Apple	O
announced	O
and	O
scheduled	O
the	O
launch	O
of	O
the	O
128GB	O
variant	O
of	O
4th	O
generation	O
iPad	B-Device
.	O
</s>
<s>
Following	O
the	O
announcement	O
of	O
the	O
iPad	B-Operating_System
Air	I-Operating_System
on	O
October	O
22	O
,	O
2013	O
,	O
sales	O
of	O
the	O
fourth-generation	O
iPad	B-Device
were	O
discontinued	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
was	O
reintroduced	O
on	O
March	O
18	O
,	O
2014	O
,	O
following	O
the	O
discontinuation	O
of	O
the	O
iPad	B-Operating_System
2	I-Operating_System
.	O
</s>
<s>
In	O
order	O
to	O
make	O
its	O
reintroduction	O
a	O
low-end	O
device	O
to	O
the	O
iPad	B-Operating_System
Air	I-Operating_System
,	O
its	O
price	O
was	O
cut	O
by	O
20%	O
over	O
its	O
original	O
launch	O
price	O
.	O
</s>
<s>
On	O
October	O
16	O
,	O
2014	O
,	O
the	O
fourth-generation	O
iPad	B-Device
was	O
discontinued	O
in	O
favor	O
of	O
the	O
iPad	B-Operating_System
Air	I-Operating_System
2	I-Operating_System
;	O
the	O
iPad	B-Operating_System
Air	I-Operating_System
took	O
its	O
place	O
as	O
the	O
entry-level	O
iPad	B-Device
at	O
that	O
time	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
shipped	O
with	O
iOS	B-Operating_System
6.0	I-Operating_System
and	O
later	O
,	O
iOS	B-Operating_System
7	O
.	O
</s>
<s>
It	O
can	O
act	O
as	O
a	O
hotspot	B-Application
with	O
some	O
carriers	O
,	O
sharing	O
its	O
Internet	O
connection	O
over	O
Wi-Fi	O
,	O
Bluetooth	O
,	O
or	O
USB	B-Protocol
,	O
and	O
also	O
access	O
the	O
Apple	B-Application
App	I-Application
Store	I-Application
,	O
a	O
digital	O
application	B-Application
distribution	O
platform	O
for	O
iOS	B-Operating_System
.	O
</s>
<s>
The	O
service	O
allows	O
users	O
to	O
browse	O
and	O
download	O
applications	B-Application
from	O
the	O
iTunes	O
Store	O
that	O
were	O
developed	O
with	O
Xcode	B-Operating_System
and	O
the	O
iOS	B-Operating_System
SDK	I-Operating_System
and	O
were	O
published	O
through	O
Apple	O
.	O
</s>
<s>
From	O
the	O
App	B-Application
Store	I-Application
,	O
GarageBand	B-Application
,	O
iMovie	B-Operating_System
,	O
iPhoto	B-Operating_System
,	O
and	O
the	O
iWork	B-Application
apps	O
(	O
Pages	B-Application
,	O
Keynote	B-Protocol
,	O
and	O
Numbers	B-Operating_System
)	O
are	O
available	O
.	O
</s>
<s>
The	O
iPad	B-Device
comes	O
with	O
several	O
pre-installed	O
applications	B-Application
,	O
including	O
Siri	B-Application
,	O
Safari	B-Application
,	O
Mail	O
,	O
Photos	O
,	O
Video	O
,	O
Music	O
,	O
iTunes	O
,	O
App	B-Application
Store	I-Application
,	O
Maps	O
,	O
Notes	O
,	O
Calendar	O
,	O
Game	B-Operating_System
Center	I-Operating_System
,	O
Photo	O
Booth	O
,	O
and	O
Contacts	O
.	O
</s>
<s>
Like	O
all	O
iOS	B-Operating_System
devices	O
,	O
the	O
iPad	B-Device
can	O
sync	O
content	O
and	O
other	O
data	O
with	O
a	O
Mac	O
or	O
PC	O
using	O
iTunes	O
,	O
although	O
iOS	B-Operating_System
5	O
and	O
later	O
can	O
be	O
managed	O
and	O
backed	O
up	O
without	O
a	O
computer	O
.	O
</s>
<s>
Although	O
the	O
tablet	B-Device
is	O
not	O
designed	O
to	O
make	O
phone	O
calls	O
over	O
a	O
cellular	O
network	O
,	O
users	O
can	O
use	O
a	O
headset	O
or	O
the	O
built-in	O
speaker	O
and	O
microphone	O
to	O
place	O
phone	O
calls	O
over	O
Wi-Fi	O
or	O
cellular	O
using	O
a	O
VoIP	B-Application
application	B-Application
,	O
such	O
as	O
Skype	B-Application
.	O
</s>
<s>
The	O
device	O
has	O
a	O
dictation	O
application	B-Application
,	O
using	O
the	O
same	O
voice	O
recognition	O
technology	O
as	O
the	O
iPhone	B-Operating_System
4S	I-Operating_System
.	O
</s>
<s>
The	O
user	O
speaks	O
and	O
the	O
iPad	B-Device
types	O
what	O
they	O
say	O
on	O
the	O
screen	B-Device
,	O
though	O
the	O
iPad	B-Device
must	O
have	O
an	O
internet	O
connection	O
available	O
(	O
via	O
Wi-Fi	O
or	O
cellular	O
network	O
)	O
due	O
to	O
the	O
feature	O
's	O
reliance	O
on	O
Apple	O
servers	O
to	O
translate	O
the	O
speech	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
has	O
an	O
optional	O
iBooks	B-Application
application	B-Application
,	O
which	O
displays	O
books	O
and	O
other	O
ePub-format	O
content	O
downloaded	O
from	O
iBooks	B-Application
.	O
</s>
<s>
Despite	O
being	O
a	O
direct	O
competitor	O
to	O
both	O
the	B-General_Concept
Amazon	I-General_Concept
Kindle	I-General_Concept
and	O
Barnes	B-Application
&	I-Application
Noble	I-Application
Nook	I-Application
,	O
both	O
Amazon.com	B-Application
and	O
Barnes	O
&	O
Noble	O
offer	O
e-reader	O
apps	O
for	O
the	O
iPad	B-Device
.	O
</s>
<s>
The	O
4th	O
generation	O
iPad	B-Device
,	O
unlike	O
its	O
immediate	O
predecessor	O
,	O
the	O
3rd	B-Operating_System
generation	I-Operating_System
iPad	I-Operating_System
,	O
is	O
supported	O
by	O
iOS	B-Operating_System
10	I-Operating_System
;	O
however	O
,	O
it	O
was	O
announced	O
at	O
the	O
Apple	O
WWDC	O
2017	O
that	O
the	O
4th	O
generation	O
iPad	B-Device
(	O
along	O
with	O
the	O
iPhone	O
5/5C	O
)	O
will	O
not	O
support	O
iOS	B-Operating_System
11	I-Operating_System
,	O
as	O
it	O
is	O
a	O
32-bit	O
iPad	B-Device
.	O
</s>
<s>
iOS	B-Operating_System
10.3.3	I-Operating_System
is	O
the	O
latest	O
and	O
final	O
version	O
of	O
iOS	B-Operating_System
to	O
include	O
support	O
for	O
the	O
Wi-Fi	O
only	O
models	O
of	O
these	O
devices	O
.	O
</s>
<s>
iOS	B-Operating_System
10.3.4	I-Operating_System
is	O
the	O
latest	O
and	O
final	O
version	O
of	O
iOS	B-Operating_System
to	O
include	O
support	O
for	O
the	O
cellular	O
models	O
of	O
these	O
devices	O
,	O
released	O
to	O
fix	O
an	O
issue	O
caused	O
by	O
the	O
GPS	O
week	O
number	O
rollover	O
.	O
</s>
<s>
The	O
device	O
has	O
an	O
Apple	O
A6X	O
SoC	B-Architecture
which	O
comprises	O
a	O
32-bit	O
Apple	O
dual-core	B-Architecture
CPU	I-Architecture
running	O
at	O
1.4GHz	O
and	O
a	O
quad-core	B-Architecture
PowerVR	B-Device
SGX554MP4	O
GPU	B-Architecture
,	O
1GB	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
It	O
also	O
features	O
a	O
5-megapixel	O
,	O
rear-facing	O
camera	B-Protocol
capable	O
of	O
1080p	O
video	O
recording	O
;	O
and	O
a	O
720p	O
HD	O
front-facing	O
videophone	B-Application
camera	B-Protocol
designed	O
for	O
FaceTime	B-Operating_System
.	O
</s>
<s>
The	O
device	O
features	O
a	O
9.7	O
"	O
(	O
diagonal	O
)	O
display	O
with	O
a	O
resolution	B-General_Concept
of	O
2,048	O
by	O
1,536	O
(	O
QXGA	O
)	O
resulting	O
in	O
3.1million	O
pixels	B-Algorithm
,	O
this	O
gives	O
the	O
display	O
a	O
pixel	B-Algorithm
density	I-Algorithm
of	O
264ppi	O
.	O
</s>
<s>
The	O
total	O
number	O
of	O
pixels	B-Algorithm
used	O
in	O
the	O
display	O
of	O
the	O
fourth-generation	O
iPad	B-Device
is	O
four	O
times	O
that	O
of	O
the	O
iPad	B-Operating_System
2	I-Operating_System
–	O
providing	O
even	O
scaling	B-Algorithm
from	O
the	O
prior	O
model	O
.	O
</s>
<s>
As	O
with	O
all	O
previous	O
generations	O
of	O
iPhone	B-Operating_System
and	O
iPad	B-Device
hardware	O
,	O
there	O
are	O
four	O
buttons	O
and	O
one	O
switch	O
on	O
the	O
fourth-generation	O
iPad	B-Device
.	O
</s>
<s>
With	O
the	O
device	O
in	O
its	O
portrait	O
orientation	O
,	O
these	O
are	O
:	O
a	O
"	O
home	O
"	O
button	O
on	O
the	O
face	O
of	O
the	O
device	O
under	O
the	O
display	O
that	O
returns	O
the	O
user	O
to	O
the	O
home	O
screen	B-Device
,	O
a	O
wake/sleep	O
button	O
on	O
the	O
top	O
edge	O
of	O
the	O
device	O
,	O
and	O
two	O
buttons	O
on	O
the	O
upper	O
right	O
side	O
of	O
the	O
device	O
performing	O
volume	O
up/down	O
functions	O
,	O
under	O
which	O
is	O
a	O
switch	O
whose	O
function	O
varies	O
according	O
to	O
device	O
settings	O
,	O
generally	O
functioning	O
either	O
to	O
switch	O
the	O
device	O
into	O
or	O
out	O
of	O
silent	O
mode	O
or	O
to	O
lock/unlock	O
the	O
orientation	O
of	O
the	O
screen	B-Device
.	O
</s>
<s>
Externally	O
,	O
the	O
fourth-generation	O
iPad	B-Device
is	O
identical	O
to	O
its	O
predecessor	O
apart	O
from	O
the	O
differences	O
between	O
dock	O
connectors	O
used	O
and	O
change	O
of	O
manufacturers	O
that	O
produce	O
the	O
display	O
.	O
</s>
<s>
The	O
display	O
responds	O
to	O
other	O
sensors	O
:	O
an	O
ambient	O
light	O
sensor	O
to	O
adjust	O
screen	B-Device
brightness	O
and	O
a	O
3-axis	O
accelerometer	O
to	O
sense	O
orientation	O
and	O
switch	O
between	O
portrait	O
and	O
landscape	O
modes	O
.	O
</s>
<s>
Unlike	O
the	O
iPhone	B-Operating_System
and	O
iPod	B-Device
Touch	I-Device
's	O
built-in	O
applications	B-Application
,	O
which	O
work	O
in	O
three	O
orientations	O
(	O
portrait	O
,	O
landscape-left	O
and	O
landscape-right	O
)	O
,	O
the	O
iPad	B-Device
's	O
built-in	O
applications	B-Application
support	O
screen	B-Device
rotation	O
in	O
all	O
four	O
orientations	O
,	O
including	O
upside-down	O
.	O
</s>
<s>
The	O
tablet	B-Device
is	O
manufactured	O
either	O
with	O
or	O
without	O
the	O
capability	O
to	O
communicate	O
over	O
a	O
cellular	O
network	O
.	O
</s>
<s>
All	O
models	O
can	O
connect	O
to	O
a	O
wireless	B-Architecture
LAN	I-Architecture
via	O
Wi-Fi	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
is	O
available	O
with	O
16	O
,	O
32	O
,	O
64	O
or	O
128GB	O
of	O
internal	O
flash	B-Device
memory	I-Device
,	O
with	O
no	O
expansion	O
option	O
.	O
</s>
<s>
Apple	O
sells	O
a	O
"	O
camera	B-Protocol
connection	O
kit	O
"	O
with	O
an	O
SD	B-Device
card	I-Device
reader	O
,	O
but	O
it	O
can	O
only	O
be	O
used	O
to	O
transfer	O
photos	O
and	O
videos	O
.	O
</s>
<s>
The	O
audio	O
playback	O
of	O
the	O
fourth-generation	O
iPad	B-Device
has	O
a	O
frequency	O
response	O
of	O
20Hz	O
to	O
20,000	O
Hz	O
.	O
</s>
<s>
Without	O
third-party	O
software	O
it	O
can	O
play	O
the	O
following	O
audio	O
formats	O
:	O
HE-AAC	O
,	O
AAC	B-Application
,	O
Protected	B-Application
AAC	I-Application
,	O
MP3	B-Application
,	O
MP3	B-General_Concept
VBR	I-General_Concept
,	O
Audible	O
formats	O
(	O
2	O
,	O
3	O
,	O
4	O
,	O
AEA	O
,	O
AAX	O
,	O
and	O
AAX+	O
)	O
,	O
ALAC	B-Algorithm
,	O
AIFF	O
,	O
and	O
WAV	O
.	O
</s>
<s>
This	O
iPad	B-Device
uses	O
an	O
internal	O
rechargeable	B-Architecture
lithium-ion	O
polymer	O
(	O
LiPo	O
)	O
battery	O
that	O
can	O
hold	O
a	O
charge	O
of	O
11,560	O
mAh	O
.	O
</s>
<s>
The	O
iPad	B-Device
is	O
designed	O
to	O
be	O
charged	O
with	O
a	O
relatively	O
high	O
current	O
of	O
2amps	O
using	O
the	O
included	O
12W	O
USB	B-Protocol
power	O
adapter	O
and	O
Lightning	B-Architecture
connector	I-Architecture
.	O
</s>
<s>
While	O
it	O
can	O
be	O
charged	O
by	O
an	O
older	O
USB	B-Protocol
port	O
from	O
a	O
computer	O
,	O
these	O
are	O
limited	O
to	O
500milliamps	O
(	O
0.5amps	O
)	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
if	O
the	O
iPad	B-Device
is	O
in	O
use	O
while	O
powered	O
by	O
a	O
computer	O
,	O
it	O
may	O
charge	O
very	O
slowly	O
,	O
or	O
not	O
at	O
all	O
.	O
</s>
<s>
High-power	O
USB	B-Protocol
ports	O
found	O
in	O
newer	O
computers	O
and	O
accessories	O
provide	O
full	O
charging	O
capabilities	O
.	O
</s>
<s>
Like	O
any	O
rechargeable	B-Architecture
battery	I-Architecture
,	O
the	O
iPad	B-Device
's	O
battery	O
loses	O
capacity	O
over	O
time	O
.	O
</s>
<s>
However	O
,	O
the	O
iPad	B-Device
's	O
battery	O
is	O
not	O
user-replaceable	O
.	O
</s>
<s>
In	O
a	O
program	O
similar	O
to	O
iPod	O
and	O
iPhone	B-Operating_System
battery-replacement	O
programs	O
,	O
Apple	O
promised	O
to	O
replace	O
an	O
iPad	B-Device
that	O
does	O
not	O
hold	O
an	O
electrical	O
charge	O
with	O
a	O
refurbished	O
unit	O
for	O
a	O
fee	O
.	O
</s>
<s>
The	O
iPad	B-Device
(	O
4th	O
generation	O
)	O
was	O
the	O
last	O
iPad	B-Device
that	O
has	O
an	O
32-bit	O
processor	O
and	O
one	O
of	O
the	O
last	O
Apple	O
products	O
to	O
have	O
a	O
32-bit	O
processor	O
,	O
along	O
with	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
and	O
iPhone	B-Operating_System
5C	I-Operating_System
,	O
which	O
has	O
the	O
A6	O
chips	O
.	O
</s>
<s>
The	O
Smart	O
Cover	O
,	O
introduced	O
with	O
the	O
iPad	B-Operating_System
2	I-Operating_System
,	O
is	O
a	O
screen	B-Device
protector	O
that	O
magnetically	O
attaches	O
to	O
the	O
face	O
of	O
the	O
iPad	B-Device
.	O
</s>
<s>
Smart	B-Device
Covers	I-Device
have	O
a	O
microfiber	O
bottom	O
that	O
cleans	O
the	O
front	O
of	O
the	O
iPad	B-Device
and	O
wakes	O
up	O
the	O
unit	O
when	O
the	O
cover	O
is	O
removed	O
.	O
</s>
<s>
Apple	O
offers	O
several	O
other	O
accessories	O
,	O
most	O
of	O
which	O
are	O
adapters	O
for	O
the	O
proprietary	O
Lightning	B-Architecture
connector	I-Architecture
,	O
the	O
only	O
port	O
besides	O
the	O
headphone	O
jack	O
.	O
</s>
<s>
A	O
dock	O
holds	O
the	O
iPad	B-Device
at	O
an	O
angle	O
,	O
and	O
has	O
a	O
dock	O
connector	O
and	O
audio	O
line-out	O
port	O
.	O
</s>
<s>
The	O
iPad	B-Device
can	O
use	O
Bluetooth	O
keyboards	O
that	O
also	O
work	O
with	O
Macs	B-Device
and	O
PCs	B-Device
.	O
</s>
<s>
The	O
iPad	B-Device
can	O
be	O
charged	O
by	O
a	O
standalone	O
power	O
adapter	O
(	O
"	O
wall	O
charger	O
"	O
)	O
compatible	O
with	O
iPods	O
and	O
iPhones	B-Operating_System
,	O
and	O
a	O
12	O
watt	O
charger	O
is	O
included	O
.	O
</s>
<s>
The	O
fourth-generation	O
iPad	B-Device
received	O
positive	O
reviews	O
from	O
critics	O
and	O
commentators	O
.	O
</s>
<s>
The	O
review	O
by	O
Gareth	O
Beavis	O
of	O
TechRadar	O
praised	O
the	O
device	O
for	O
its	O
high-resolution	O
Retina	B-Operating_System
Display	I-Operating_System
,	O
which	O
TechRadar	O
wrote	O
is	O
"	O
one	O
...	O
of	O
the	O
most	O
impressive	O
we	O
've	O
seen	O
on	O
a	O
tablet	B-Device
to	O
date.	O
"	O
</s>
<s>
However	O
,	O
the	O
reviewer	O
also	O
wrote	O
that	O
the	O
screen	B-Device
"	O
lacks	O
the	O
'	O
punch	O
 '	O
seen	O
in	O
Super	O
AMOLED	B-Algorithm
screens	O
seen	O
on	O
devices	O
like	O
the	O
Samsung	O
Galaxy	O
Note	O
2.	O
"	O
</s>
<s>
The	O
review	O
also	O
praised	O
the	O
interface	O
of	O
the	O
iPad	B-Device
for	O
its	O
simple	O
design	O
and	O
easy	O
to	O
use	O
layout	O
.	O
</s>
<s>
Additionally	O
,	O
other	O
aspects	O
,	O
such	O
as	O
the	O
design	O
of	O
the	O
iPad	B-Device
and	O
updated	O
SoC	B-Architecture
were	O
noted	O
and	O
praised	O
in	O
the	O
review	O
.	O
</s>
<s>
Critically	O
,	O
Beavis	O
noted	O
that	O
the	O
iPad	B-Device
can	O
still	O
moderately	O
heat	O
up	O
under	O
medium	O
usage	O
,	O
however	O
not	O
to	O
the	O
extent	O
seen	O
in	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
.	O
</s>
<s>
Tim	O
Stevens	O
of	O
Engadget	B-Application
praised	O
the	O
Retina	B-Operating_System
Display	I-Operating_System
and	O
labelled	O
it	O
as	O
the	O
best	O
screen	B-Device
available	O
on	O
tablets	B-Device
.	O
</s>
<s>
Benchmarks	O
and	O
tests	O
conducted	O
by	O
Engadget	B-Application
resulted	O
in	O
Stevens	O
concluding	O
that	O
the	O
fourth-generation	O
iPad	B-Device
is	O
the	O
fastest	O
Apple	O
mobile	O
device	O
available	O
,	O
surpassing	O
a	O
"	O
record	O
"	O
that	O
the	O
iPhone	B-Operating_System
5	I-Operating_System
held	O
for	O
a	O
brief	O
period	O
.	O
</s>
<s>
Benchmark	O
tests	O
conducted	O
by	O
SlashGear	O
concluded	O
that	O
the	O
SoC	B-Architecture
of	O
the	O
fourth-generation	O
iPad	B-Device
is	O
able	O
to	O
perform	O
CPU-reliant	O
tasks	O
more	O
than	O
twice	O
as	O
fast	O
as	O
that	O
of	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
.	O
</s>
<s>
A	O
series	O
of	O
benchmark	O
tests	O
conducted	O
on	O
the	O
graphics	O
performance	O
of	O
the	O
fourth-generation	O
iPad	B-Device
by	O
Anandtech	O
resulted	O
in	O
the	O
device	O
achieving	O
the	O
highest	O
score	O
compared	O
to	O
other	O
consumer	O
mobile	O
devices	O
,	O
including	O
the	O
Samsung	B-Application
Galaxy	I-Application
S	I-Application
III	I-Application
,	O
Nexus	B-Device
10	I-Device
and	O
third-generation	B-Operating_System
iPad	I-Operating_System
.	O
</s>
<s>
The	O
performance	O
increase	O
of	O
the	O
fourth-generation	O
iPad	B-Device
varies	O
between	O
tests	O
,	O
however	O
an	O
increase	O
is	O
nonetheless	O
evident	O
.	O
</s>
<s>
Furthermore	O
,	O
battery	O
longevity	O
tests	O
conducted	O
by	O
the	O
same	O
organization	O
suggests	O
that	O
the	O
battery	O
of	O
the	O
fourth-generation	O
iPad	B-Device
is	O
able	O
to	O
last	O
longer	O
than	O
its	O
predecessor	O
.	O
</s>
<s>
However	O
,	O
the	O
battery	O
of	O
the	O
updated	O
iPad	B-Operating_System
2	I-Operating_System
is	O
able	O
to	O
outlast	O
the	O
fourth-generation	O
iPad	B-Device
.	O
</s>
<s>
In	O
the	O
first	O
weekend	O
of	O
sales	O
of	O
the	O
iPad	B-Device
Mini	I-Device
and	O
fourth-generation	O
iPad	B-Device
,	O
Apple	O
reported	O
that	O
it	O
sold	O
an	O
aggregated	O
number	O
of	O
3	O
million	O
units	O
.	O
</s>
<s>
TechRadar	O
noted	O
that	O
the	O
first	O
weekend	O
sales	O
figures	O
for	O
the	O
fourth-generation	O
iPad	B-Device
are	O
lower	O
than	O
corresponding	O
figures	O
for	O
the	O
third-generation	B-Operating_System
iPad	I-Operating_System
,	O
which	O
sold	O
3	O
million	O
units	O
in	O
its	O
first	O
weekend	O
.	O
</s>
<s>
Subsequent	O
reports	O
and	O
analysis	O
such	O
as	O
that	O
from	O
David	O
Hsieh	O
,	O
a	O
technology	O
analyst	O
,	O
suggest	O
that	O
the	O
iPad	B-Device
mini	I-Device
is	O
selling	O
better	O
than	O
the	O
fourth-generation	O
iPad	B-Device
.	O
</s>
<s>
In	O
a	O
repairability	O
review	O
conducted	O
by	O
iFixit	O
,	O
the	O
fourth-generation	O
iPad	B-Device
scored	O
2	O
out	O
of	O
10	O
(	O
10	O
being	O
the	O
easiest	O
to	O
repair	O
)	O
due	O
to	O
the	O
use	O
of	O
adhesive	O
to	O
attach	O
components	O
.	O
</s>
<s>
However	O
,	O
reviewers	O
noted	O
that	O
several	O
components	O
such	O
as	O
the	O
screen	B-Device
and	O
battery	O
could	O
be	O
removed	O
easily	O
for	O
replacement	O
.	O
</s>
