$7S is available as an ERC-20 token on the Ethereum blockchain. To transact and purchase $7S we will need to first setup a wallet. For this we will be using MetaMask, a third party browser wallet, that will allow you to interact on the Ethereum Blockchain. If you are using desktop on Google Chrome/Firefox, visit metamask.io to download and add the extension to your browser, and follow the instructions to set up your wallet. If you are on mobile you can get MetaMask's app for either iPhone or Android and follow the instructions on your screen for setup.