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 Wrist-Worn GPS Personal Training Device with Heart Rate Monitor (discontinued by manufacturer) (discountinued by manufacturer) : Amazon.co.uk: Sports & Outdoors
Garmin Forerunner 305
Garmin Forerunner 305 con sensor de cadencia nueva en venta BTT
Reloj garmin forerunner 305 de segunda mano por 50 EUR en Madrid en WALLAPOP