SUUNTO, Bike Sensor to Measure Distance, Speed and Cadence on Your Rides, Compatible with Sports Watches and Mobile apps That Support Bluetooth Smart or ANT+, Black, SS022477000
Suunto Bike Sensor - Cycling speed and cadence sensor
Suunto Bike Sensor - Cycling speed and cadence sensor
Suunto Bike Sensor Bluetooth and ANT+ Cadence, Speed and Distance Tracker, Black : Amazon.ca: Sports & Outdoors