Features 1.Capable of performing measurements on a wide range of material, including metals, plastic, ceramics, composites, epoxies, glass and other ultrasonic wave well-conductive materials. 2.Transducer models are available for special application, including for coarse grain material and high temperature applications. 3.Probe-Zero function, Sound-Veloctiy-Calibration function. 4.Two-Point Calibration function. 5.Coupling status Indicator showing the coupling status. 6.Battery i