5
+/-
Switches the sign of the displayed value between
positive (+) and negative (-).
%
I.
Use this key in combination with arithmetic
operator keys to perform percent.
II.
Setting TAX rate.
MODE
Change mode between the calculator and the
keypad status.
SEND
Send the calculation result to PC when the device
is in calculator mode or in keypad mode.
+
=
Num Lock ON: Input symbol “+”.
Num Lock OFF: Input symbol “=”.
00
，
Num Lock ON: Input “00”.
Num Lock OFF: Input symbol “
，
”.
