Not the device - the function. This is in a pub. I've paid for my dinner by Interac, and the waitress got distracted and left the device with me. After finishing with my transaction, this menu (pic: menu.jpg) appeared on the device. What on Earth could Advice be? So I pressed it, and it went to the second screen (pic: input.jpg). The title is Advice, and all that it provides is a field for entry of a dollar amount. I asked two waitresses, and neither of them had any idea what it might be for. Obvious throwaway answer is that they charge for advice here, but seriously... any ideas?