Interesting feature, especially now when VISA announced it's strong collaboration with Coinbase. Might be more useful in the future decades, right now it's really expensive to use such card, especially with Coinbase's fees policy.
It is a visa debit card which is connected to one’s Coinbase account. It allows one to spend any cryptocurrency which is stored in one’s Coinbase account. It converts on its own to required cryptocurrency at the point of purchase.