The I/O coins were the second of Cryptogifts’ releases. Like the Peercoins, they are available in gold and silver plate with 100 serialized units of each. They are based on the alternative crypto-currency I/O Coin. They follow the same format as the Peercoin rounds, with an increased usage of enamel. Cryptogifts explained the choice to use enamel as opposed to paint, reasoning that enamel hardens very well and cannot be scratched off as opposed to paint which is known to chip easily. The front features the text ‘WWW.IOCOIN.IO | Digital Currency’, and the back is the same as for the Peercoin rounds except that ‘I/O Coin’ is specified.