An electronic price tag is composed of separable internal and display modules and is adapted for wireless adjustment. The ID module is mounted to the goods at, for example, a point of manufacture for the goods, and contains a transponder and CPU, a receiver/decoder module, for example a horn, mounted to the placard for receiving signals from a remote location and decoding same to be inputted to the price display field and an electrically controlled latching mechanism to temporarily hold the modules together. The display module consists of a display placard, a plurality of price display fields on the placard. The separated ID module is capable of performing security and inventory functions where display is not needed. The display module is reusable and may contain a rechargeable battery.