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
Garmin Forerunner 305 GPS Receiver with Heart Rate Monitor -...
Garmin Forerunner 305 Red GPS Receiver Running Watch With Heart Rate Monitor BOX | eBay
Garmin Forerunner 305 with heart rate | SidelineSwap