This is the LDG Z-100Plus Tuner is the first and only tuner I have ever used. This tuner works great and very easy to use. I have never used a tuner before and I had no problems figuring it out. LDG Z-100Plus automatic antenna tuners sport 2,000 memories that store both frequency and tuning parameters. These small and simple-to-use tuners will run on any voltage source from 7 to 18 V, or six AA batteries will run them for a year of normal use. Current draw while tuning is less than 100ma. The LDG Z-100Plus antenna tuners now include an internal frequency counter, so the operating frequency is stored with tuning parameters to make memory tunes a blazingly fast 0.1 seconds (full tunes take an average of only 6 seconds). Great tuner for the money