Features: This auto brake oil tester is a practical and fast testing tool for determining the brake oil quality, so you can know if you need to replace the brake oil. The car brake oil testing pen features 3 LED lights to display the percentage of moisture content in the brake fluid, an easy to read visual signal. The brake fluid tester is convenient to use and can be used to test the car brake oil moisture content. The brake oil testing pen is equiped with tire pressure detectionbutton, the testing is accurate and fast. The brake oil tester is compact and lightweight, portable and easy to store. It is a good tool for home or car repair shop to use. Specifications: Material:ABS Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Brake Fluid Tester