Simple-to-read traffic light system to show moisture levels in the brake fluid. Compatible with DOT 3, DOT 4 and DOT 5.1 brake fluid. Digital tyre pressure gauge with light which can be displayed in bar, psi, kPa and kg/cm². Pressure range: 3-150psi(0.2-10.4 bar). Bright LED display, ideal for reading the screen in low light conditions. Powered by 2 x LR44 batteries (supplied).