Use two ExtoWallet Cards for either dual card based Multi-signatures or use the card to duplicate your ExtoWallet. Bundle of two ExtoWallet Cards: 
 
ExtoWallet Card is a Biometric Smart Card securing your crypto assets. 
The cards each feature:
Secure means of creating and storing your private crypto keys
On-card fingerprint recognition and Pin input
Navigation touch wheel
E-ink display 
Secure Bluetooth connectivity
Built-in NFC and USB connecvity
Rechargerable battery
USB charging cradle and cable