Features: The device is equipped with a fast microprocessor; have a small and comfortable size and work with Ultrasonics. Widely used for measuring Metal and Nonmetal materials, Steel, Aluminum, Zincs, Plastic, PVC, Glass, Ceramics and any other good Ultrasonics conductors as long as it have top and bottom surfaces. The Ultrasonics thickness tester have a wide ranges of 1.2mm to 225mm. The device is equipped with a fast microprocessor, have a small and comfortable size and work with Ultrasonics User can select the preset sound values among various materials, sound speed adjustment ranges is 1000-9999m/s, sound speed also is defined customizable for the digital Ultrasonics thickness better base on your different application. LCD screen display with backlits display Ultrasonics thickness tester, statistic view, calibration, low battery indicators, store/recall function. Specifications: Component:ABS Measuring Ranges:1.2-225.0mm(steel) Display:4-digital LCDdisplay Minimum display unit: 0.1mm Working frequency: 5MHz Minimum limit for tube measuring: 20x3mm（steel) Accuracy:+/-(1%H+0.1)mm H denotes the measured thickness. Sound Ranges:1000-9999m/s Measuring Ranges:1000-9999m/s. Operation temperature: 0-40℃ Power supply: 3x1.5V batteries(Not Included) Normal operation current: ≤50mA With Backlights turn on current≤120mA Current:≤20uA Size:Approx.146x72mm/5.75x2.83inch Package Includes: 1Pc Ultrasonics Thickness Gauges note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.