Universal Output Socket - The product features a universal outlet that can accept plugs from almost any country and is fully grounded from input to output to ensure a safer operation. ConvertingboxTM technology - It uses a toroidal transformer for efficiency, noise-free operation, and delivers a more compact voltage converter, that is approximately half the size and less weight compared to traditional transformers. Select a proper size voltage transformer by checking the max power rating in W or WATT on your electronics and then purchase a transformer at least 1.25x that size to account for any surges or spikes during operation. Fuse Protection - The fuse will cut off the power to the transformer during a power overload and you can easily replace the fuse to reset the transformer. LiteFuze transformers are designed with safety in mind and are CE-certified. Heavy Duty Step Up/Down Operation - Convert 110/117/120V AC to 220/230/240V AC OR 220/230/240V AC to 110/117/120V AC. Set the input voltage switch in the back based on the country's voltage and connect your appliance to the appropriate outlet in the front. Note that these transformers only convert the voltage and the output Hz (frequency) remains the same as the input. Lifetime Copper Coil - each transformer is wound with premium coil and wire to ensure a reliable and efficient performance over a long period of time. These transformers aren't designed to operate on US 220V and aren't compatible with US 220V appliances, you can use them to power US electronics abroad in a 220V country or use 220V electronics in N. America on 120V.