Is this a hardware wallet or some software you are working on that can run on a normal computer? (offline?)
The cold wallet works as follows.
1) Download our Android app on a device of your choice.
2) Keep the device on airplane mode while the Android app is installed.
3) Use the Android app to create your wallet following your own entropy.
4) Use the Android device to sign offline the transactions you generated online via our webapp (all communications offline/online are via QR codes).
5) Use our trustless mechanism based on Shamir Secret Sharing to transmit your wallet to your heir.
Here's some additional description of the cold wallet:
www.selftrust.meWe give you USD 5 worth of btc to test our wallet and give us your impressions.