Avoid using paper, printing, and labeling errors on the shelves using electronic shelf labeling systems, which allow you to update wirelessly and in real time the prices of your products and information.   With the electronic shelf labeling systems from Opticon with LCD technology, you can display logos and images allowing you a greater interaction with the buyer. Because of the wireless ZigBee technology, you can change the price depending on the time or the date, display targeted advertising to emphasize promotions or selected products. They can also show barcodes which can be read for applications as inventory or shelving control with portable terminals.