Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is the over speed limit warning audible?
Document: That is another improvement. There are a few minor quibbles that keep it from being a 5, but honestly, I don't know of any GPS that I would rate a 5 yet. There is room for improvement on all of them. One room for improvement is that when you use this in the auto mode (and it does fit on the dash of my Ford Focus), many of the useful alerts (like speed limit changes and school zones) are not available.
Come on Garmin, that is not RV friendly. Find a way to update in smaller bytes or do a better job to begin with. Most RV'rs don't have ready update access.So then the next question might be, is it reliable? Yes, it does seem to get you down the road well. You can see upcoming gas, food on the side, the warnings of speed limit changes seems close to reality, and the routes so far are good.
Also liked it for displaying the speed limit with pretty good accuracy. Every once in a while it would get stuck showing a speed limit of 55, but a quick reset and re-selection of the destination fixes it. Fairly good POI database too, you'll appreciate it even more it if you like commercials. Didn't try the voice recognition feature much, but it seems to be really good, it would try to execute anything that the radio says.
I have 2 built in Navi systems in 2 Honda's that I own. I like this touch screen system a lot better,. It's easier to use and has more features. You can choose from several different stats to show on your screen - current speed, miles left to destination, time left to destination, expected arrival time at your destination, etc. Showing the current speed limit is accurate about 90% of the time and showing whether you're exceeding that limit helps those of us with a lead foot.
Oh my freaking Lord, I bought this thing to keep me on routes suitable for my RV!Today the camel's back shattered. I entered tomorrow's destination into the unit. When I reviewed the route, I lost it! Had we followed the recommended route we would have driven down a long, narrow, winding road, down a steep hill to a ferry. This ferry has a 5 ton limit!
We are still learning this thing, but noticed that if you have &#34;fuel saving mode&#34;, as compared to &#34;fastest&#34;, selected, the routing can get interesting as it seems to take into account road speed and conditions. In one case while we were in automobile mode, we crossed over a main highway and then traveled on a feeder road for a few miles before entering the main highway.
I bought a Magellan in May of 2012 that was supposed to be better that sliced bread for the RV'er. It turned out to be a mistake that I regretted. See my review for that product. Anyway, after I finally couldn't take it any longer, I came back to Garmin.This unit does everything that I had hoped the Magellan would do and MUCH MORE. It will tell you the current elevation as well as the speed your are going.
Easy to see, easy to hear, nice features like announcing speed change ahead. Announces lane changes well in advance. The down side is the limitation in all Garmin software and data. We cannot fully trust where it is leading us.On the road between the interstate and the truck stop it will often announce that this road may not be suitable for RV's, which leads us to wonder how much or little it really knows about the roads.
Works great fo my 40' RV. Better than the one built into the RV. Gives more heads up info such as speed changes, sharp curve ahead, narrow road ahead than any previous Garmin I have owned. Great view on 7 &#34; screen. Split screen helpful. Just a great all around unit. Avoids U turns I can't make towing a car. Love it do far.
Warning, this is about the most inaccurate gps I have ever dealt with. As a standard navigation gps I suppose it's ok, but when you are using it in RV mode that is when its issues crop up. It seems unless you are within a few miles of major highways the RV function is useless. It will display "RV accessibility unknown" on a good 50% of the smaller roads in my area (western PA).
Answer: I believe it is a beeping sound rather than the voice saying "you're over the speed limit!" It has happened to us a couple of times...does make the driver look at the screen and you see the speed limit flashing.  Hope this helps