Displayï¼?E-ink 3 Colors Epaper Display Screen sizeï¼?2.13 inch , 212*104pix, 111DPI Usageï¼?Price Display Electronic shelf label Batteryï¼?2*CR2450 Power Lifeï¼?â?¥ 5 years Replacement batteryï¼?Available,Quick release Frequencyï¼?433MHz Sub-GHz ISM Cacheï¼?4 pages LED lightï¼?3 colors up to 7 combination Working Temperatureï¼?0-40 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).