ESD Safe Surface Resistivity Tester/Indicator Kit (Similar to ACL 385) Specifications: Test Voltage & Current: Nominal ... Ohms per S-11.11 in one decade incrementsOver range indicator light for "Insulative" surfaces, i.e., >1012 Ohms/square or ... :1) Battery,2) Ground Jack; ESD Safe Surface Resistivity Tester Indicator Kit