Name for crypto bracelet

[Lion_King_]

Hello everyone, I am developing a project to pay for travel in public transport, where payment will be made using a bracelet, but instead of ordinary fiat currencies, there will be an interchangeable token and, in the future, cryptocurrencies. I would like to ask how you can call this device, which in your opinion would be interesting for this, because the so-called Smart Wrisband is not needed by anyone for nothing. I look forward to your interesting suggestions.
When I finish, I will publish the White Paper.
Thank you for attention.