<s>
The	O
Valve	B-Device
Index	I-Device
is	O
a	O
consumer	O
virtual	B-Device
reality	I-Device
headset	I-Device
created	O
and	O
manufactured	O
by	O
Valve	O
.	O
</s>
<s>
Half-Life	B-Application
:	I-Application
Alyx	I-Application
is	O
bundled	O
in	O
with	O
the	O
headset	O
.	O
</s>
<s>
The	O
headset	O
uses	O
an	O
IPS	B-Architecture
fast	O
switching	O
1440×1600	O
LCD	B-Device
panel	I-Device
for	O
each	O
eye	O
for	O
a	O
combined	O
resolution	O
of	O
2880×1600	O
.	O
</s>
<s>
The	O
headset	O
is	O
intended	O
to	O
be	O
used	O
with	O
the	O
Valve	B-Device
Index	I-Device
Controllers	O
—	O
known	O
during	O
development	O
as	O
the	O
Knuckles	B-Device
Controllers	I-Device
—	O
but	O
is	O
also	O
backward	B-General_Concept
compatible	I-General_Concept
with	O
the	O
HTC	O
Vive	O
and	O
HTC	O
Vive	O
Pro	O
controllers	O
.	O
</s>
<s>
The	O
Valve	B-Device
Index	I-Device
Controllers	O
have	O
a	O
joystick	B-Device
,	O
touchpad	B-Application
,	O
two	O
face	O
buttons	O
,	O
a	O
menu	O
button	O
,	O
a	O
trigger	O
,	O
and	O
an	O
array	O
of	O
87	O
sensors	O
that	O
allow	O
the	O
controllers	O
to	O
track	O
hand	O
position	O
,	O
finger	O
position	O
,	O
motion	O
,	O
and	O
pressure	O
to	O
create	O
an	O
accurate	O
representation	O
of	O
the	O
user	O
's	O
hand	O
in	O
virtual	O
reality	O
.	O
</s>
<s>
The	O
Valve	B-Device
Index	I-Device
is	O
Valve	O
's	O
first	O
virtual	B-Device
reality	I-Device
headset	I-Device
developed	O
and	O
manufactured	O
in	O
house	O
,	O
and	O
is	O
planned	O
to	O
be	O
the	O
launch	O
console	O
for	O
Valve	O
's	O
upcoming	O
virtual	O
reality	O
games	O
.	O
</s>
<s>
In	O
February	O
2021	O
,	O
Valve	O
registered	O
patents	O
for	O
a	O
new	O
VR	B-Device
headset	I-Device
,	O
describing	O
the	O
improvements	O
over	O
the	O
previous	O
model	O
.	O
</s>
<s>
It	O
sold	O
an	O
estimated	O
149,000	O
sets	O
in	O
2019	O
,	O
103,000	O
of	O
which	O
were	O
in	O
the	O
fourth	O
quarter	O
due	O
to	O
the	O
announcement	O
of	O
Half-Life	B-Application
:	I-Application
Alyx	I-Application
,	O
which	O
buyers	O
received	O
for	O
free	O
.	O
</s>
<s>
As	O
of	O
December	O
2019	O
,	O
6.67	O
%	O
of	O
the	O
VR	O
units	O
connected	O
to	O
Steam	O
are	O
Valve	B-Device
Index	I-Device
sets	O
.	O
</s>
<s>
While	O
Valve	O
had	O
anticipated	O
supply	O
for	O
many	O
of	O
those	O
that	O
had	O
ordered	O
the	O
Index	O
in	O
time	O
for	O
the	O
March	O
2020	O
release	O
of	O
Half-Life	B-Application
:	I-Application
Alyx	I-Application
,	O
the	O
COVID-19	O
pandemic	O
impacted	O
production	O
of	O
the	O
Index	O
which	O
left	O
Valve	O
with	O
a	O
reduced	O
number	O
of	O
units	O
available	O
on	O
the	O
release	O
date	O
.	O
</s>
