Tom....as I have the Garmin 2730 which is basically the same as your 2820, minus the Bluetooth feature, I have a suggestion for you. The first ride with my GPS showed me that the screen washed out in the sun and I couldn't see a thing on it. I ordered the GlareStomper and that cover improved readability a great deal. Email Dave Reichert and ask for the 2820 cover with slanted sides. It's made so you can get to the buttons easier and is not shown on the web site for some reason. The full cut version as illustrated does not fit as well in my opinion.
glarestomper@yahoo.comhttp://www.glarestomper.com/index.html
