Mercury – Voltmeter 8–18V | Electrical System Monitoring | White Face | Brushed Bezel | 79-8M6020069Mercury Voltmeter 818V Electrical System Monitoring White Face Brushed Bezel 79 8M6020069 OverviewThis 818V voltmeter gives you a clear look at how the boats electrical system is holding up without the needle bouncing every time you hit a bit of chop. The sweep is slow and steady, so you can spot an odd dip or spike with a quick glance. Out on the water, it becomes a simple habittake a look, make sure things look normal, and keep running. Its a low