• Integrated circuitry checks moisture content of fluid by measuring the electrical resistance and comparing it with acceptable limits.• Easy calibration check using water.• Five LED read-out.• Just switch on and insert probe for immediate result.• Works on all grades of brake fluid.• Powered by 1 x AAA battery (supplied).Integrated circuitry checks moisture content of fluid by measuring the electrical resistance and comparing it with acceptable limits. Easy calibration check using water. Five LED read-out. Just switch on and insert probe for immediate result. Works on all grades of brake fluid. Powered by 1 x AAA battery (supplied).• Integrated circuitry checks moisture content of fluid by measuring the electrical resistance and comparing it with acceptable limits. • Easy calibration check using water. • Five LED read-out. • Just switch on and insert probe for immediate result. • Works on all grades of brake fluid. • Powered by 1 x AAA battery (supplied). • Model No. VS0274Technical S