Hi Andrew. The 6.5 is a good all rounder,the 4.5 good for hilly areas but lacks on longer distance,the 9 is better for flat distance,I use the 6.5 works great in the high country.i mounted my CB on the side of the console near my hip area,and the mic on the side console near my knee,but my knee kept knocking the channel button on the mic and changed the channels,it took me awhile to work out why no one in the convoy was talking lol,myself I prefer the unit has the channel and squelch ect than the mic,can't accidentally change the channel,that's just my opinion.cheers garry
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