MFJ GrandMaster SWR/Power Meters are the Cadillacs of ham radio! If you simply will not settle for less than the best accuracy and precision these MFJ GrandMaster are for you. You ge ta large 3.25x1.25 inch precision illuminated meter for easy wide-angle viewing. A highly visible black and red meter scale on a bright white background makes it quick and easy to read SWR, forward or reflected power. Meter lamp requires 13.8 VDC or 110 VAC. Power pigtail included for wiring.