MFJ Digital SWR/Wattmeters FWD, REF, SWR at a Single Glance! Covers 1.8-60 MHz 0-200 Watts New MFJ Digital SWR/Wattmeters display Forward, Refelected Power, SWR and Battery life all in a single glance! Large 1/2in forward power digits and 5/8 Reflected and SWR digits! LCD screen is 2.25 inches diagonally. Power on/off, backlight on/off switches. Power with triple AAA battery or micro USB port. SO-239 Connectors. Super compact 4W x 3H x 1D inches.