In Slovakia 230 V, 50Hz electrical system is used and appliances are designed for a round pin plug and receptacle (socket) with male grounding pin. For safety and to avoid damage to electrical appliances, it is important to bring equipment designed for the mentioned frequency and voltage, use dual voltage equipment or voltage converters/transformers. Moreover, plug adapter will also be needed if your device is constructed for other standards.

Picture of plug and socket

For those bringing U.S. standard equipment, an earthed (grounded) step‑down transformer is necessary for U.S. computers, monitors and printers. Even with the most expensive transformers, one should always monitor the electrical supply. Most printers will need an adapter but not all adapters are recommended for printers.

In all cases, it is worth checking the manufacturer's label or your owner's manual to see what type of input the device can handle or contacting your appliance manufacturer's technical departments and asking for their recommendations for transformers and surge protectors.