1. A portable apparatus for use in enabling subsequent electronic purchase of a product by capturing identifying data during or shortly after electronic radio transmission associated with a corresponding product is received, the apparatus comprising: an activation input to receive an activation request from a user; a frequency detection circuit for detecting a current frequency setting of a nearby radio in response to receiving the activation request; an RF receiver for capturing RDBS data embedded at the detected broadcast frequency responsive to receiving the activation request; and a digital memory for storing at least an activation time when the activation request was received, the detected frequency setting of the nearby radio, and at least part of the captured RDBS data, to support subsequent identification of the advertised product to enable quick and easy purchase of the product by or on behalf of the user.