【Wide Compatibility】This 12V Brake Fluid Tester is compatible with DOT-3, DOT-4, DOT-5.1, and most synthetic brake fluids, a good tool to monitor brake oil condition by detecting the water content in the brake fluid, and helps you determine whether the brake fluid needs to be replaced. NOTE: Country of Origin: China. 【Normal mode and expert mode】The expert mode is convenient for professional mechanics to select the appropriate brake fluid model for accurate testing. The brake fluid tester can test DOT-3, DOT-4 and DOT-5.1 brake fluids and offers specific test options for brands such as MOTUL, ATE, FERODO, MOBIL, BREMBO, TRW, BOSCH, CASTROL, TOTAL, VALEO, FUCHS, etc. NOTE: Please check the type of brake fluid before purchasing. 【Moisture Content Test】Indicates [ OK ] when the water content is between 0%-2%, [ ! ] when the water content is between 2%-3%, and [ X ] when it is higher than 3%. 【2.8' HD Display with Backlight】The MRCARTOOL Brake Fluid Moisture Meter has a 2.8-inch LCD display with backlight, which provides users with a clearer display regardless of strong light or dark night, making your work more efficient and effortless. 【High-sensitivity probe】Equipped with a high-sensitivity sensor and a 260mm long foldable hose that can be rotated 180 degrees. The outer layer of the hose is made of 304 stainless steel, which is characterised by its oil resistance, oxidation resistance and corrosion resistance. The overall construction is smooth and compact. 【Wide Compatibility】This 12V Brake Fluid Tester is compatible with DOT-3, DOT-4, DOT-5.1, and most synthetic brake fluids, a good tool to monitor brake oil condition by detecting the water content in the brake fluid, and helps you determine whether the brake fluid needs to be replaced. NOTE: Country of Origin: China.