The M4Y/M4W/M5W/M4M series digital voltmeters can measure and display AC or DC voltage in numeric form. All models feature a 7-segment LED display for clear indication of measured values. The meters can display RMS or AVG values based on user preference (AC voltage). User-friendly functions including auto-zero adjustment and hold display value functions are included (except M5W). The meters are available in various standard DIN size cases for convenient installation