Metrix Plus - 1.5 V Ultrasonic Thickness Gauge has alkaline batteries that charge quickly and last for a longer duration. The batteries are strong enough to resist changing weather conditions without any damage being caused. The Ultrasonic Thickness Gauge helps determine the thickness of the metal coatings and the defects needed to be solved. The plastic metal undergoes the blowing technique to present accurate readings without errors. The echo technique is used in the 1.5 V Ultrasonic Thickness Gauges that measures the time taken by the sound to circle back and come. The difference is then noted, and measurements are calculated. Product Specifications- Brand- Metrix Plus Weight-340 grams Model- UTG27 Measuring range- 1- 400 mm Product Dimensions- 130 x 67x 30 mm Power- 1.5 V x 4 battery Sound velocity- 500 -900 meter per second