Pls kindly choose the registered air parcel as the delivery option. It is the regular mail shipping, delivery time is 15-30 business days.
Registered air parcel shipping is available in South America.
Add Singapore Post to South America Pleasenicolasjimenezc commented
The more people have access to "LinkIt 7688 Smart Duo" community will grow more so I think that should mail cheaper because many do not have much money to pay 60 USD shipping.