Product Review
Remember to leave at least a 100% margin for power surges/spike when buying a transformer. Some items, such as televisions and computer monitors spike when you turn them on. For these products you need to buy a voltage converter transformer that is at least 3 times the items capacity. For power tools, laser printers and heating appliances like coffee makers, toasters, microwaves, lasers, halogen or fluorescent bulbs you must leave a margin of 4 times. It doesn't hurt to buy a transformer that is rated much higher than listed watts on your device.







![Rockstone Power 3000 Watt Heavy Duty Step Up/Down Voltage Transformer Converter - Step Up/Down 110/120/220/240 Volt - 5V USB Port - CE Certified [3-Year Warranty]](https://m.media-amazon.com/images/I/4167bZBzFML._SL75_.jpg)


