Stock level alerting device utilizing RFID tag

摘要

An automatic stock level alerting device comprises a collapsible display associated with the stock, and a remote identification means. The collapsible display has a collapsed state and a deployed state and is resiliently biased towards the deployed state. It further includes a signal blocking means for preventing detection of the remote identification means when the display is in its collapsed state. The remote identification means is preferably an RFID tag and a metal paint or foil layer is provided to block radio frequency signals. The collapsible display may comprise a foldable wedge with means to bias it into an erected configuration. The display may include an information sign when in the deployed state. A detector is provided for detecting signals from unblocked remote identification means and communicating the detection to a computer, e.g. a remote server.