left
top
of
some
keys
z
Press
the
“fn”
key
at
the
same
time
if
you
want
to
type
the
blue
symbols
on
the
left
top
of
some
other
keys
Technical
Specification
Of
The
Product:
Bluetooth Specification: Version 2.0
Operation Current: 3mA
Standby Current: 0.2mA
Operation Voltage: 3.7V
Charging Voltage: 110-240V