Usage : Electronic Shelf Label, electronic price tag Display : 3 Colors E-ink Epaper Display Feature : Black+White+Red Display Size : 1.54inch 152*152pix,140DPI Battery : 1 * CR2450 Replace Battery : Quick Release Power Life: more than 5 Years Frequency : 443MHz Memory : 4 Pages Cache LED Light : available ,R/G/B/C/M/Y/W 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