1High Compatibility: This tester is designed to test brake fluids of various types, including DOT3, DOT4, and DOT5.1, perfectly meet the needs of the driver. 2Quick Testing: This car brake fluid tester quickly detects the water content in brake fluid, allowing for an instant assessment of its quality. 3Lcd Display: The detector features an Lcd screen that displays the test results in a clear and easy to understand manner, making it convenient to use. 4Backlight Function: Equipped with a backlight, this analyzer can be used in environments with poor lighting, ensuring accurate readings. 5Alarm Reminder: Detector has an alarm feature that alerts users with sound and flashing screen when the brake fluid needs to be replaced, ensuring timely maintenance.