The bidirectional voltage converter with a power of 800 W is a device designed to reduce the alternating voltage AC-230V to AC-115V or to increase the alternating voltage AC-115V to AC-230V. This device is suitable for the safe use of foreign equipment, e.g., from the USA in Poland, or for powering Polish devices in many European countries. Its high reliability and efficiency are ensured by the metal, robust construction and the use of modern components, including the toroidal transformer.