Install this Update Kit in your Model 5060 or Model 5065 ElectriCalc Pro to update your calculator to the newest NEC Codes and your calculator will support NEC Code years 1996 through and including 2011.Your calculator will continue to be fully updateable to future code changes.NEC 2011 Compliance notice. The 2011 NEC Code has been examined and there are several impacts as it relates to calculations in Model 5065 and Model 5060. Setting the calculator to NEC 2011 will make it compliant to the new code. - Ship Weight: 3.00 lbs.