You have 2 options here:
Bluetooth Cycling Speed/ Cadence Sensor
The Armor-X Bluetooth Cycling Sensor is the perfect companion on your next bike trek. Link the Sensor to your smartphone via bluetooth to help track your cycling speed and cadence.The sensor can be used with a number of smartphone biking apps, such as Wahoo, MapMyRIDE, Runtastic Road Bike, Strava Cycling and more. It is also waterproof, has a Bluetooth 4.0 transmitter and can run for up to a year on the same batteries.
Bluetooth Heart Rate Sport Monitor
The new Armor-X Bluetooth Heart Rate Monitor turns your phone into your own personal trainer.Track your heart rate by connecting the Heart Rate Moniter via Bluetooth to your smartphone. The Heart Rate Monitor comes in handy when you're exercising by assisting you in tracking your heart rate and optimize your workouts to help you reach your health goals.The Heart Rate Monitor is also detachable, so the chest strap is easy to wash between sweat sessions. The Armor-X product can be used with various fitness apps, such as Wahoo, Runtastic, MapMyRIDE and more.
Armor X Bluetooth Cycling Speed/ Cadence Sensor
Bluetooth Heart Rate Sport Monitor
Bluetooth Cycling Speed/ Cadence Sensor
Bluetooth Heart Rate Sport Monitor