How to Test: - Press the button for power on, LED will light up. - Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs. - Auto power off . Testing Reasult: Green LED light = water content in the brake fluid H2O Yellow LED light = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later Red LED light = water content in the brake fluid H2O> 3%, the brake fluid need to replace immediately, it is dangerous!!! Attention : 1. Replace battery if the gree LED not light p any longer after you press power on button.Wash the test probe with tab water after use. 2.In case of skin contact with brake fluid,thoroughly wash the affected skin or clothing with water. 3.Do not expose brake fluid to the atmosphere for a long time as the fluid is highly hygroscopic!
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