Useful Links

Garmin 305 Forerunner Official Site
You can read many details and information about Garmin 305 Forerunner in their manufacturer site. Details like complete features, technical specification and etc.
www.garmin.com/

Garmin 305 Forerunner on Wikipedia
In this wikipedia, you can browse the complete list of Garmin GPS products including Garmin 305 Forerunner.
http://en.wikipedia.org/wiki/Garmin