Prokit's Industries NT-6580 - Manual (Page 10)

6. Numeric Keypad
Numeric keypad was integrated into NT-6580 Laser Distance Measurer,
which can be used as an ordinary calculator, and also used in the
calculation of measurements.
Launch/Quit Calculator
Launch: When the device is in the mode of measurement, viewing
historical data, or standby, press any numeric key（0～9）or to enter
Calculator, meanwhile a calculator icon
will be seen on display.
Quit: When the device is in calculator mode, press to clear data, press
again to quit calculator mode.
Keypad List
Addition
Subtraction
Multiplication
Division (Long press)/Decimal Point
← Backspace
＝ Equal Sign
Ordinary Calculator
When in calculator mode, user can use the device to do four arithmetic
operations (Addition, Subtraction, Multiplication, and Division.), the figure
is accurate up to four decimal places.
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