Foneso F100 User Manual Work -

The F100 uses AAA batteries . If you plan to store the device for more than a month, remove the batteries to prevent corrosion.

Use these buttons for adding or subtracting consecutive measurements. Advanced Measurement Modes

For additional support or to request a larger print PDF of the manual, users are encouraged to visit the official Foneso support page or contact their retailer directly. User Manual - Smith Surveying Equipment

Press once to turn the device on or to activate the laser. Press again to take a measurement.

Press once to clear the last entry; hold for 3 seconds to shut the device off manually. The unit will auto-power off after approximately 150 seconds of inactivity to save battery.