Pro'sKit NT-8540 - Device Button Functions; Core Operation Buttons; Measurement Mode Buttons

Button functions
1. Power on / Laser on / Measure
2. Area/Volume
3. Pythagorean
4. Addition/Go up
5. Subtraction/Go down
6. Reference point
7. Historical data
8. Clear / Power off
9. Backlight / Unit
10. Continuous measurement
11.Side measuring button
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