Universal Brake Fluid Tester, Portable Precision Brake Oil Quality Control Digital Test Pen, Auto Vehicle Automotive Diagnostic Test Tool

• 5 LED indicators show the test results more accurate.
• Easy to use, only a few seconds to know the result, it shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance.
• Automatic shutdown.
• Power supply by AAA batteries (not included).
• International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

Easy to check your cars' brake oil quality. Apply to：DOT3 DOT4 DOT5.1 Tester Instructions: Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance. Red indicates the brake fluid needs immediate replacement, green represents good condition, yellow indicates the state is acceptable but soon replaced. 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. 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. 7, Green / yellow / yellow / red / red: brake oil in water content of at least 4%, the brake fluid must be replaced immediately responsible for very dangerous. Package Including： 1 x Brake Fluid Tester（No battery）