The short answer to your questions is yes, no and maybe.
Generally antenna are tuned for specific frequencies and may sortof work on one band but not another. Also an antenna that works on Sprint may be lousy on the bands for Verizon. It can even be so specific that it works well on the Sprint 4G but poor on the Sprint LTE bands. However based on the details above it looks like it will cover most of the major 3G, 4G and LTE bands used in North America (it just does not break down how well on each band). It should also cover WIFI on the B, G and N on the 2.4ghz band. Your biggest concern should be the antenna cable length and quality. You are looking at roughly 6db of loss from the LMR200 cable (give or take a few db depending on brand/quality of cable and the specific band you are using it for). To do WIFI you would likely need a different cable or a pig tail that converts the cable to a different connector. The one thing I would recommend is keep your cable length to a minimum, if you do not need the 30ft cable, don't use it, get another LMR200 cable that is just barely long enough for what you need.
I have written a number of posts on my blog about WIFI, cellular, amps, antennas and cable type for RV's if you are interested in some longwinded opinions
rwbradley12.wordpress.com take a look in the RV tech category.
