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). Features & Benefits: • 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. VS0274 Specifications: Model No VS0274 Brand: Sealey Nett Weight: 0.05kg