Hayatec Simple Brake Fluid Tester Tool probe is made of High-precision metal material, which offer a durable and accurate long use. After testing, remember to clean it with dry cloth or paper to keep. 1, the green LED lights = water content in the brake fluid H2O <1.5%, brake fluid qualified 2, the yellow LED lights = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later 3, the red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced Red LED: change brake fluid 4, LED red flashing: battery replacement 5, LED yellow: low moisture content, check again in six months 6, LED green: brake fluid lines / cell row Features: Five LED indicators show the test results more accurate.
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