Black Friday is here! Save 50% on selected items. https://uk.pi-supply.com/collections/black-friday. Use code: BLACKFRIDAY2020
Opendime is a small USB stick (cryptocurrency hardware wallet) that allows you to spend Bitcoin like a dollar bill. Pass it along multiple times. Connect to any USB to check balance. Unseal anytime to spend online. Trust no one.
Each Opendime holds one private key. It publishes the public key (payment address) to anyone and never reveals the key until "unsealed".