APC-Microsol isolator modules are an excellent option for users that need protection for equipment in buildings with poor or nonexisting grounding. The isolator modules ensure protection from electrical shocks on the conected equipment and provide protection against utility power failures, such as undervoltages, overvoltages and line noises. APC-Microsol isolator modules have bivolt input operation and come with resettble circuit breaker that avoids replacing fuses. They also have a two-prong plug that allows connection in both two and three prong wall outlets. Available in models with and without AVR.