The SP620401B with Led Segment Display 3 0.4'' ( 10.16mm ) Cathode (Negative electrode ) Blue Through Hole RoHS is a segmented LED display device manufactured by ARK Tech. It features a 3 digit 0.4'' ( 10.16mm ) blue LED and a cathode connection, mounted in a through hole package. It is fully RoHS compliant and designed for use in a wide variety of applications, including LED panel displays, indicators, and other general purpose communication devices. The display is viewable from both front and back surfaces, and can be used in either a positive or negative orientation. It has a long life and low power consumption, making it ideal for a variety of consumer, industrial, and commercial applications.