Usage : Electronic Shelf Label Electronic Price Tag Display : E-ink E-paper Display Screen Size : 2.9inch, 296*128pix, 112DPI Battery : CR2450 * 2 Replace Battery : Quick Release Power Life: 5 Years Frequency : 443MHz Display Color : Yellow Black White Memory : 4 Pages Cache LED Blinking : Available, R,G,B What is Suny Electronic Shelf Label? Our Electronic Shelf Label System make up by three parts: Electronic Shelf Label, Base Station, Software. Working principle : PC(software) control Station by LAN, Station control price tag by Wireless(433MHz). MOQ=100PCS