EFO is a Australian appointed supplier of high quality Appa and Klein Digital Multi meters and Test Equipment. We Supply Digital Multimeters CAT IV for Utility’s. ASPs. Metering Installers and Electrical Contractors. Our products are suited for Industrial. Commercial and Domestic environments. Our range of High Quality Digital Multimeters specifically all provide the essential relevant safety category of CAT IV 600V. Furthermore we select with best quality and value products. Consequently Saving you time on confusing options.