Features: Universal Fit for DOT3/DOT4/DOT5.1 Brake Fluid Detection: The brake fluid tester can support 3 brake oil type detection and detect DOT3/DOT4/DOT5.1 brake fluid. LCD Color Screen: The brake fluid tester is equipped with an LCD color screen, which can intuitively and clearly display the percentage of brake fluid water content, allowing you to view the test results at a glance. Sound Alarm: When the water content is over 3%, the brake fluid tester will emit an alarm to remind you to change the brake fluid immediately to ensure safety. 235mm Flexible Probe: The brake fluid tester is equipped with a 235mm metal probe, which can be bent at will, allowing easy access and flexible testing even in hard-to-reach areas. CAL Self-Calibration Function: Due to the wide range of brands and manufacturers of brake fluid, and the differences in manufacturing and processing processes of brake fluid from different manufacturers, there may be cases where the test index of new brake fluid is higher than 1%. This brake fluid tester with the function of CAL self-calibration is a good solution to such situations. Specifications: Item Name: LCD Display Digital Brake Fluid Tester Main Material: Plastic, Metal Power Supply: 4 * AAA Battery (Included) Color: Light Blue Probe Size: 235*9mm Package Information: Package Size: 240*220*55mm Package Weight: 500g Package List: 1 * Brake Fluid Tester 4 * AAA Battery 1 * Storage Case 1 * Manual