Voltage Converter 220v to 110v - RM50.00

The Voltage Converter 220v to 110v shown in the link you posted should not be with electronic products, such as those mentioned by the OP. That type of Converter uses solid-state technology to reduce the voltage, rather than a Transformer and the output is not especially "clean". When connected to a solid-state product such as a Camera Charger, unfortunate consequences can occur! Most manufacturers of electronic products such as cameras specifically recommend against using their products with that type of Converter. High wattage Voltage Converters are more appropriate for appliances with a simple resistive heating element and no electronic controls. However, some manufacturers of Flat Irons recommend against using ANY Voltage Converters with their products. If a Voltage Converter MUST be used, a better option is this model from Magellan. This will automatically select the proper conversion method, so the user doesn't have to worry about choosing the correct method, or forgetting to change a switch.

You need that box to convert the electricity from AC to AC or vice versa. The converter plug usually has a transformer box with an adapter in one piece. If not then you would have to buy an adapter to plug into the wall then plug your converter into the adapter then plug-in your US bought device. The reason why you would buy this is for your devices that don't have a box (i.e. your straightener). If you simply use an adapter with your American bought straightener then it'll blow up or do something else unpleasant.

Sometimes the names for converters and adapters can get mixed up… The employee that I talked to told me that I would only need certain pieces for my computer and digital camera needs. Make sure that you talk to someone who knows which piece you should get.

I didn't buy any converters because I'm only using my phone charger, computer, and digital camera on this trip. They all come with transformer boxes so I just need them to fit into the wall (adapter). If I find out that I need a straightener it's cheaper to buy one in France and plug it straight into the wall.