It transmits at a constant speed and distinguishes the waves reflected from the back of the instrument.2. It can also be widely used in manufacturing, metal processing, commodity inspection and other materials that allow ultrasonic waves.3. Ultrasonic thickness gauge is suitable for materials that conduct and reflect constant sound waves, such as metal, plastic, ceramic, glass, etc.4. The intelligent hand-held ultrasonic thickness gauge is controlled by microprocessor, which can measure the thickness quickly and accurately, and has the sound of various materials, without the need of ultrasonic measurement damage.5. The tool is capable of accurately measuring parts in different materials or industrial production, as well as monitoring pressure vessels in pipes and production equipment, and the degree of corrosion of various parts.6. Measurement range: 1.00 -300.0mm7. Data Storage: 15008.8.3 1.2V nickel-metal hydride rechargeable battery but not equippedSpecification: Package Weight One Package Weight 0.83kgs / 1.82lb One Package Size 28cm * 20cm * 7cm / 11.02inch * 7.87inch * 2.76inch Qty per Carton 20 Carton Weight 19.50kgs / 42.99lb Carton Size 68cm * 47cm * 32cm / 26.77inch * 18.5inch * 12.6inch Loading Container 20GP: 260 cartons * 20 pcs = 5200 pcs 40HQ: 605 cartons * 20 pcs = 12100 pcs