Brake Fluid Tester

- Comparative electrolytic type tester. - Checks moisture content of fluid by resistance to electric current. - Easily calibrated using new brake fluid. - Audible test cycle with three LED read-out. - Just insert probe and press-button for immediate result. - Works on DOT 3, 4 and 5.1 specification fluids. - Powered by a 9V battery (not included).