Brake Fluid Tester Car Diagnostic Tool 5 LEDs Brake Fluid Testing Tools Features 1. To check the quality of brake fluid quality. 2. 5 LEDs to indicate percentage of water in the brake fluid. 3. Automatically power off. 4. Operated by a LR03 AAA 1.5V battery. 5. Press the button for power on, green LED will light up. 6. Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs. Indications: 1. Green: Battery OK, i.e.: No Water Contained in the Brake Fluid. 2. Yellow: Less than 1% of Water Content in Brake Fluid. 3. YellowYellow: Approximately 2% of Water Content in Brake Fluid. 4. YellowYellowRed: Approximately 3% of Water Content in Brake Fluid. The Brake Fluid Should be Changed. 5. YellowYellowRedRed: at least 4% of Water Content in Brake Fluid. The Brake Fluid Must be Changed Urgently, Extreme Danger. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store