- Scope of application: Automotive Brake Fluid Detector is compatible with most vehicles. It checks the health status of DOT-3, DOT-4, DOT-5.1 brake fluids and most synthetic brake fluids. It is convenient for personal use and widely used in individual workshops, repair shops, and dealer workshops. - Precision test and universal probe: Highly sensitive and precise probe quickly detects DOT-3, DOT-4, DOT-5.1 brake fluids, delivering results in seconds. The gooseneck probe provides flexibility in detection. Probe top includes a flashlight to observe the brake fluid color if needed. - Easy instant read and alarm: High sensitivity probe, high resolution screen, and audible alarm give instant results. The large backlit display is easy to read in sun or at night, and the device is not limited by environment. If the brake fluid shows excessive water content, an alarm reminds you to change the fluid. - Premium quality and ergonomic design: The body has a refined texture, compact size, and comfortable hand feel. The gooseneck surface is oil- and oxidation-resistant and not easily corroded. Simple control panel for easy operation. Probe top includes a flashlight to observe the fluid color when needed.