The MFJ-868B is the worlds largest SWR/Wattmeter! It has a giant 6½ inch (diagonally across) display screen and covers 1.8-54 MHz. Built to be visible from any angle, its huge scale gives you ultra-fine resolution and the high-contrast numbers makes reading a breeze -- even across your shack. The meter needle position and motion gives you an accurate indication for whats going on quickly without actually reading the scale. MFJs exclusive True Peak Reading Circuit technology allows reading circuit captures at true peak or average forward and reflected power readings. Built with 20/200/2000 Watt ranges, this wattmeter makes it essential for QRP or QRO operation. The full SWR scale makes reading SWR much more accurate and easier to read. A Power Saver mode is also available - circuit turns on meter only when RF power is being measured. Use 9 volt battery or 12 VDC or 110 VAC with optional MFJ-1312D. Cabinet measures 7W x 5 1/2H x 5D inches.