### Low-voltage Alert

The first level protection will blink red LED continuously.

Method of Acquiring Line Loss Voltage

1. Get a fully charged battery voltage.
2. Select Protection Switch ON. Fill a reasonable warning voltage in the No Load and 0 in Loss at the moment.
3. Fly the multi-rotor until the protection is triggered, and then land it ASAP.
4. Get the new voltage. The Loss is the difference between the new voltage and the No Load voltage you entered.

First Level Protection Setting
Fill a reasonable voltage in No Load, and the acquired Loss voltage in Loss. It will auto-calculate the Loaded voltage.

Tips

1. Use a voltmeter or the "Current Voltage" to obtain the voltage.
2. Make sure your ESCs protection voltage is lower than 3.1V (1S).