When doing the initial activation of the Dash button, you had to choose the item that it would purchase from a list of items belonging to the corresponding bran

When doing the initial activation of the Dash button, you had to choose the item that it would purchase from a list of items belonging to the corresponding brand on the button itself. The available choices were fairly diverse, differing in style/quantity/price/etc. When you pressed the button, you know what you were buying and how much it cost, because you're the one who set it up. As for how to determine whether the purchase went through or not, an LED would light/flash on the button to indicate success/failure, and you'd receive an email with more detailed information such as the item being purchased, its cost, and the address where it will be shipped. If the button press was a mistake, you could simply cancel the order.