From this window you can only send Bitcoin to a wallet associated with your account. When you enter a Bitcoin amount to send, an estimated equivalent US dollar amount will be shown. You can add a description into the description window which will be transmitted as part of your transaction. You have to select a wallet from the Bitcoin Wallet dropdown list where you want to send your bitcoins to. The Bitcoin amount you enter must be greater than or equal to the available balance minus the transaction fees. If the amount in your Vault is less, a popup window will show indicating insufficient balance. After clicking on the send button your application will navigate you to the invoice screen.