Heart Rate Monitors
Heart rate monitors are made up two parts. There's a transmitting belt worn around your chest and a receiver and display unit that's either located on your handlebar on on your wrist like a watch. As the name suggests, they're for monitoring how hard your heart is working at any given moment.
Mio Fuse Heart Rate MonitorRRP
Mio Cycle Series Heart Rate Monitor.RRP
Polar A370 Fitness Tracker WatchRRP
Polar OH1 Optical Heart Rate SensorRRP