The III/IV series are junk. Every time I hear someone say how much they love their III/IV, I just shake my head and wonder if they really know any better, or if they're just blessed with 110% coverage and saturation by whatever radio system they're paged from. Contrast that with people who have used every model from I through V in areas with spotty/fringe radio coverage on low band, will tell you that the II was the best voice pager /\/\ produced. Unfortunately they aren't made anymore, and parts are NLA, so the II isn't very viable these days. The V is a fair bit better than the III/IV series, but in terms of sheer sensitivity, selectivity, alerting reliability and durability, the V still doesn't measure up to the II. Sure, it has quite a bit more bells and whistles, but all of that comes at a price, unfortunately.