Digital Line Monitor

RMS voltage monitoring is the only way to measure your true sine or modified sine inverters' output. Also monitors power from generator or park power pedestal. Highly legible, back-lit display reads frequency in Hz. Provides an audible alert in case of hazardous electrical conditions, such as reversed polarity or bad ground, while the display shows cause of alert. Functions as a surge suppressor (300 Joules, 10, 000 amps). Conveniently plugs into a three-pole electrical outlet for permanent monit