The Garmin Forerunner 305 GPS unit with heart rate monitor. You can keep tabs on how hard you're working, making sure to neither over or under exert yourself. (Photo by Walter Cruz/Dallas
TRAMsoft GmbH - GARMIN Forerunner 305 (deutsch)
GARMIN Forerunner 305 GPS Receiver | eBay
Garmin Forerunner 305 vs Garmin Forerunner 310XT: What is the difference?
Garmin Forerunner 305 GPS Heart Rate Monitor | REI Co-op