... the device start upWorking @ It will show input voltage and output voltageLow-voltage @ @ @ Over-voltage @ @ @ Over-temperature @ @ @ Overload @ @ @ SpecificationRBE-500VARBE-1000VARBE- ... main products are voltage stabilizers, voltage regulators, inverters, voltage regulator ,silicon rectifying chargers, low voltage apparatus, reactors, current transformers, voltage transformers and circuit ...