<s>
Rezence	B-Algorithm
(	O
pronounced	O
reh-zense	O
)	O
is	O
an	O
interface	O
standard	O
developed	O
by	O
the	O
Alliance	B-Algorithm
for	I-Algorithm
Wireless	I-Algorithm
Power	I-Algorithm
(	O
A4WP	B-Algorithm
)	O
for	O
wireless	O
electrical	O
power	O
transfer	O
based	O
on	O
the	O
principles	O
of	O
magnetic	O
resonance	O
.	O
</s>
<s>
The	O
Rezence	B-Algorithm
system	O
consists	O
of	O
a	O
single	O
power	O
transmitter	O
unit	O
(	O
PTU	O
)	O
and	O
one	O
or	O
more	O
power	O
receiver	O
units	O
(	O
PRUs	O
)	O
.	O
</s>
<s>
A	O
Bluetooth	B-General_Concept
Low	I-General_Concept
Energy	I-General_Concept
link	O
is	O
defined	O
in	O
the	O
A4WP	B-Algorithm
system	O
intended	O
for	O
control	O
of	O
power	O
levels	O
,	O
identification	O
of	O
valid	O
loads	O
and	O
protection	O
of	O
non-compliant	O
devices	O
.	O
</s>
<s>
The	O
A4WP	B-Algorithm
was	O
formed	O
in	O
early	O
2012	O
with	O
the	O
intent	O
to	O
create	O
a	O
wireless	B-Application
power	I-Application
transfer	I-Application
standard	O
to	O
compete	O
with	O
the	O
existing	O
Qi	O
standard	O
.	O
</s>
