The Roof Tile is a SHA-256 storage device for private encryption keys. These can store any cryptocurrency which uses this wallet configuration. The public address can be seen on the front of the tile in the form of a QR code. The wallet keys are made with offline wallets completely isolated from the internet or any form of communication including but not exclusively visual, aural, and electronic. They are labeled 0001 - 0005 however two were destroyed in production so only three total exist.