The DMS-20PC-8-DCM-C is a self-powered DC Voltage Monitor with positive input. It is a great replacement for older, hard-to-read and analogue panel meter. The meter is fully operational - no additional components or power supplies are required. The large 0.37-inch LED display can be easily read from 15ft away. Built-in reverse polarity protection assures simple and trouble-free installation. It employs a high-resolution, 3-1/2-digit A/D converter and precision metal-film resistors to achieve outstanding performance. A rugged epoxy-encapsulated polycarbonate case provides excellent protection against moisture, shock and vibration. It is designed to fit the same panel cut-out as Murata Power Solutions popular DMS-20PC-X-LM AC-line voltage monitors.