What the he ' ll are you on about ? You ' ve made a completely different argument . <| sep |> They are hardware wallets basically , they ' re meant to store your Dogecoins or other coins without trusting your computer or any computer you wish to spend from . They hold your privdate keys and sign your transactions internally . We use Secure Elements for that matter like what you find in HSMs , credits cards , . . Both the Nano S and the Blue support BTC , LTC , DOGE , DASH , Zcash , ETH , ETC . They also support FIDO U 2 F second factor authentication for GMail , Github , Dropbox , Dashlane . and custom applications you can write your own app or download apps from thirdparties . In the end it ' s basically a powerful credit card with a screen , buttons , and upgradable functionalities . The Nano S is small and connects to a USB port . It has a small screen and two buttons to navigate . The Blue is bigger , with a color touchscreen , a battery , USB , Bluetooth and NFC connectivity which means it will work with an iPhone when we release a client application , which is not possible with other hardware wallets .