Digital Concrete Test Hammer With Microprocessor. Standards: En 12504:Part 2 Astm C805 Bs 1881:202 Nf P18-417 Din 1048 Uni 9189. (Technical Specifications:- Impact Energy: 2.207 Joule /Nm, Measuring Range: 10 - 120 N/Mm Percent B2, Interface: Usb, Power Source: 6 Rechargeable Batteries Aa Nimh 2400Ma/Hour, Battery Life: 60 Hours With Automatic Shut Down, Operating Temperature: -10 Percent B0C 60 Percent B0C, Supplied Complete With Data Transfer Software, Data Transfer Usb Cable, Ba