<s>
The	O
Xiaomi	B-Device
Mi	I-Device
Smart	I-Device
Band	I-Device
4	I-Device
(	O
Xiaomi	B-Device
Mi	I-Device
Band	I-Device
4	I-Device
in	O
China	O
)	O
is	O
a	O
wearable	O
activity	B-Device
tracker	I-Device
produced	O
by	O
Xiaomi	O
Inc	O
released	O
in	O
China	O
on	O
16	O
June	O
2019	O
,	O
in	O
Europe	O
on	O
26	O
June	O
2019	O
and	O
in	O
India	O
on	O
19	O
September	O
2019	O
.	O
</s>
<s>
It	O
is	O
39.9	O
%	O
larger	O
than	O
its	O
predecessor	O
,	O
has	O
a	O
super	O
capacitive	B-Device
AMOLED	B-Algorithm
display	I-Algorithm
and	O
features	O
24/7	O
heart	O
rate	O
monitoring	O
.	O
</s>
<s>
Display	O
:	O
0.95	O
inch	O
AMOLED	B-Algorithm
,	O
full	O
color	O
touch	B-Device
screen	I-Device
;	O
</s>
<s>
Connectivity	O
:	O
Bluetooth	B-Protocol
version	O
5.0	O
BLE	B-General_Concept
;	O
NFC	O
on	O
some	O
models	O
;	O
</s>
<s>
Sensors	O
:	O
accelerometer	O
,	O
gyroscope	B-Application
,	O
PPG	O
heart	O
rate	O
sensor	O
,	O
capacitive	B-Device
proximity	I-Device
sensor	I-Device
;	O
</s>
