Need Advice: Peru/South America USB Charger

Need Advice: Peru/South America USB Charger. I am looking for a multiple plug USB adapter to use in Peru. It will need to charge Iphone, Tablet, GoPro camera.... etc.

Any suggestions or your experiance in Peru with charging thingswould be Great! Please Include with Links and Model numbers.

I will be traveling to: Lima, Cuzco, Machu Picchu