This 20x4 character chip-on-glass (COG) LCD shows blue pixels on a gray background. As a COG display, there's no PCB and the controller/driver is directly bonded to the glass of the display. The Liquid Crystal Display offers a wide operating temperature range from -20 to 70 degrees Celsius. The best view for this monitor is 6:00/12:00. The monitor operates on a 3.3V supply voltage and is RoHS compliant. Sinda Display is professional manufacturer of Monochrome LCD display for Industry application, include digital panel meter, UPS, inverter, multi-function meter, POS machines, Fuel Dispenser, Gas Dispenser, Flow Meter, KWH Meter, Energy Meter, Water Meter, Gas Meter, Smart Meter, Pump controller etc. For any other custom requests, feel free to contact us.