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 It’s open source but it’s not clear to me how you connect to it other than via USB. It has a micro SD slot, but NFC would be ideal for newbies (less error-prone than QRs and more secure than Bluetooth). 
 MicroSD is better than plugging it in, but nfc would be nice also.. 
 The rule is always the same: invest in companies that focus 100% of their effort and money on Bitcoin.