MFJ-994B, 600 Watt Intelli-TunerTM! automatic antenna tuner with new 10,000 VirtualAntennaTM Memories. Like MFJ-993B but handles 600 Watts SSB/CW, matches 12-800 Ohms. Does not have digital SWR/Wattmeter/LCD display, audio SWR meter/audio feedback, antenna switch or 4:1 current balun. Tuning must be done at low transceiver power with amplifier bypassed