As shown in this slide, the DMS-20RM can operate from universal 85-264VAC mains (47-63Hz) or 10 to 40VDC supplies or batteries. With flexible inputs and 2000V isolation between power source and AC signal, the DMS-20RM series is capable of true-rms AC measurements of complex waveforms. These voltmeters can also operate in 2-wire mode for easy monitoring of AC mains as well as 47mHz - 1kHz input frequency range with crest factors up to 5. The DMS-20RM features a rugged construction with a large, easy-to-read red LED display, encapsulated polycarbonate housing and reliable Euro-style terminal blocks. Three true-rms ranges are also available with full 3½ digits displayed on 20V and 200V models with up to 0.01V resolution. Additionally, the DMS-20RM requires no additional user-supplied components and is competitively priced.