Measures Modulation Percentage, Antenna SWR, and SSB Modulation | Reads RMS and Peak Power, Four watt ranges: 0 - 20, 0 - 200, 0 - 2000 and 0 - 4000 | Dosy Professional Architecture with AC/DC Power Supply | Built in phone jack for signal monitoring | Large 4 1/2 inch Backlit Meter
4 Position Antenna Switch | Three 2 1/2 inch lighted Meters | Simultaneous readouts on all 3 meters | Measures SWR | Three Watt Ranges: 0 - 10, 0 - 100, and 0 - 1000
"S" designates for single side-band users | AM / USB / LSB Frequencies | Includes 3 foot plug in speaker lead for tone generation in to mic | For any radio without hard-wiring | Allows Ham/Amateur users to accurately measure frequency in 1.8 MHz to 50 MHz range