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Hey, while purchasing from Ledger.com you have the VAT on the product + shipping + VAT on shipping and customs!
You could always check one of our official resellers based on the region you are in! Please note that if you purchase from ledger.com, Amazon, or one of our resellers network, then you have nothing to worry about as all of them take products directly form the manufacturer “Ledger” https://www.ledger.com/reseller
Regarding the OTG Kit, this is an accessory that gives you 3 types of cables!
– USB to USB-C (which already comes with the Nano S+ box)
– USB c to USB C to connect to an Android phone with a types C USB slot
– USB to micro USB
It depends how you want to use your Ledger device and connect it to PC or mobile phone!