Specification Brand : DJCDDM BulletPoint1 : Non-destructive strength hammer: Our rebound hammer has an impact energy of 2.207J and a measurement range of 10-60MPA. It is a tool for fast, cost-effective and non-destructive assessment of cast-in-place concrete. The large-capacity lithium battery is directly charged and can be used continuously for a long time. Detection BulletPoint2 : Concrete hardness tester: Portable concrete testing hammer is generally designed to give accurate readings when measuring material hardness and compressive strength. It is suitable for concrete and rocks. The ruler is easy to read and the friction force is uniformly measured. It supports wireless printing, supports data export, and test results. On-site printing data is clear at a glance BulletPoint3 : Reliable construction tools: high-quality piano wire spring, aluminum alloy spring seat buckle has good rigidity and stability, resists fatigue, and will not reduce the rebound value. The stainless steel probe has higher impact strength and stronger elasticity! It is stronger than ordinary springs. Longer service life, one machine can be used on multiple occasions BulletPoint4 : Voice broadcast & wireless printing Supports on-site printing of test results. The data is clear at a glance. The automatic test results are read to you immediately. External headphones can be connected to noisy test sites. The test results are read to you immediately. If the test site is noisy, external headphones can also be connected. BulletPoint5 : The data display is clear: the 2.2-inch color screen automatically displays the average strength rebound value after detection, without manual conversion. It is a good helper for you to test the strength of concrete. The stainless steel probe has higher impact strength and stronger elasticity! It is stronger than ordinary springs and has a longer service life Color : One Color ExternallyAssignedProductIdentifier : 8596387462903 ItemName : Digital Concrete Test Hammer, 2.2-inch Color Screen, Portable Concrete Hammer Tester, Support Data Export and Voice Broadcast ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : hardness-testing-apparatus Manufacturer : DJCDDM MeasurementAccuracy : 1 ModelNumber : DJCDDM NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : DJCDDM ProductDescription : Product information: Sensor life: more than 200,000 times Steel anvil rate fixed rebound value: 80±2 Strength measurement range: 10-60MPA Nominal kinetic energy: 2.207J Impact hammer stroke: 75MM Volume: 60MM*280MM Weight: 1.0KG Size: 275*55*85MM Indication consistency error: ±0.5 The difference between the mechanical rebound meter pointer reading and the instrument screen reading