I'm guessing you meant wireless not wired camera? The voice can be changed as can the routing options. Only you know if it's "necessary" or worth it to you. To me it's invaluable. Mine has routed me tp avoid low bridges, some exceedingly sharp turns/curves, and at one cg in PA it routed me about a mile longer but also avoided a 10%+ grade with sharp hairpin turns on a very narrow road.
Is it infallible? Certainly not. I'm not aware of anything that is. I to look at maps and use other mapping programs pre trip. I found that using and comparing multiple sources to be valuable. I've also been on trips where I know the route and ended up coming across emergency road work or an accident where there's a detour. I've found myself in that situation with nowhere to pull over 50' plus of truck and trailer to look at a map. JMHO, YMMV
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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