Brake Fluid Tester 

To Check Fluid Quality:

Press the button for power on, green LED will light up.

Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs.

Auto power off .

Indications:    
 

Green: Battery OK, i.e.: No Water Contained in the Brake Fluid

Yellow: Less than 1% of Water Content in Brake Fluid

Yellow/Yellow: Approximately 2% of Water Content in Brake Fluid

Yellow/Yellow/Red: Approximately 3% of Water Content in Brake Fluid;                                             

The Brake Fluid  Should be Changed

Yellow/Yellow/Red/Red: at least 4% of Water Content in Brake Fluid;                                                

The Brake Fluid Must be Changed Urgently, Extreme Danger .