Cards embedded with e-paper IDs. These cards use contactless proximity communication (NFC) to overwrite displayed information—including barcodes. Smartphones can also be used for overwriting.
Visible RFID uses e-paper, which alleviates the environmental burden of consuming and disposing of conventional paper labels, and also substantially reduces electricity consumption. No electricity is required to maintain displays; electricity is only used for overwriting. Visible RFID can be immediately incorporated into existing systems because the barcodes are legible to nearly all handy terminals.