- LED Flashlight
This light will help you to maintain the power unit or other  operation in dark

- LED Indicator for Low Battery
This LED indicator will blink yellow when load voltage lower than 10.5V,
and will blink red when load voltage lower than 9.5V.

- LED Indicator for Motor Overheat
This LED indicator will  blink yellow when motor temperature higher than

80°C(175°F), and will blink red when temperature higher than 90°C(195°F).