• 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).
