1. This ultrasonic thickness gauge is an intelligent handhold product, which adopts ultrasonic measuring principle, and is controlled by micro processor, provides quick and precise measurement of thickness for most of industrial material. 2. Auto calibration to assure the accuracy. 3. Auto linear compensation: this advanced software program enhances the precision by correcting the non-linear accuracy of transducer. 4. Coupling status indication: Observing the coupling icon to learn if the coupling is accomplished or not. 5. 10 thickness measurement storage and recall function available, which facilitates the height work or working in wild area. 6. Low battery indication 7. Auto power off mode designed to conserve battery life. 8. More than 10000 times long lift keys. 9. The unit has a special memory that retains all of its setting even when the power is off. 10. Power supply: 3 X 1.5V AAA batteries(Not included)