You can use an external sensor, such as the HRM 200, HRM 600, HRM‍-Fit™, or HRM-Pro™ series heart rate monitor, to view heart rate data during your activities. Some heart rate monitors can also store data or provide advanced running data (Running Dynamics) (Running Power).

You can use a foot pod to record pace and distance instead of using GPS when you are training indoors or when your GPS signal is weak.

You can use Varia™ smart bike lights to improve situational awareness. With a Varia headlight camera, you can also take photos and record video during a ride (Using the Varia Camera Controls).

You can use a Varia rearview bike radar to improve situational awareness and send alerts about approaching vehicles. With a Varia radar camera tail light, you can also take photos and record video during a ride (Using the Varia Camera Controls).

You can use a Running Dynamics Pod to record running dynamics data and view it on your watch (Running Dynamics).

You can attach speed or cadence sensors to your bike and view the data during your ride. If necessary, you can manually enter your wheel circumference (Wheel Size and Circumference).

You can attach the tempe™ temperature sensor to a secure strap or loop where it is exposed to ambient air, so it provides a consistent source of accurate temperature data.