Features: Portable ultrasonic thickness tester Rechargeable ultrasonic thickness meter Color display ultrasonic thickness tools Single point mode and scan mode MAX, MIN and AVG three test results display Measures metal, steel, plastic, ceramics, composites, epoxies, glass, silver, pvc, nylon Measures aluminum, acrylic resin and other ultrasonic wave well-conductive materials Single test mode and continuous test mode, probe-calibration Low battery indication with flashlight design Specifications: Display: 2.8 inch TFT color display Measuring range: 1-300mm (steel) Speed range: 1000-9999 m/s Resolution: 0.1mm (10mm); 0.01mm (