A method facilitating a transaction between a camera-phone user and a business entity. The magnetic body includes a magnet and a magnet casing; the magnet casing having an end wall, a lateral wall, and an end cap. 15% or less, Si:1% or less, Mn:1% or less, Cr:10 to 24%, Mo+W :5 to 17%, Al:0. At least one feedback path provides at least one input indicative of a user response to a content session presented by the user interface.