Coinkite Opendime V4

Opendime functions as a USB device that can only be written to once. It is compatible with any computer, laptop, or smartphone. A QR code and text instructions are available on the device. The private key is generated within the device itself and is not visible to anyone, not even to you. The Bitcoin world is changing rapidly, but Opendime was built on the fundamental principles that Bitcoin is based on, which have not changed in recent years. Issue and receive Opendimes. As long as they remain sealed, you can be sure that no one knows the private keys and the Bitcoins are secure. The physical Bitcoin, as it was intended: hand over the Opendime to anyone as many times as you like. It's as simple as a handshake. No miner fees or delays due to miner confirmations. Opendime uses Bitcoin message signing, standard (non-HD) Bitcoin payment addresses, and private keys in WIF format.