The TC-40001P 4,000 watt test meter measures RMS and Peak Power, Antenna SWR, Modulation Percentage and SSB Modulation. Features a large 4-1/2" meter for easy viewing and provides four wattage settings, 0 - 20, 0 - 200, 0 - 2000 and 0 - 4000. . Features built-in phone jack for key up or transmit only, headphones, AC/DC power adapter, large 4-1/2" front lit meter.