I was not satisfied with the accuracy of the wrist heart rate monitor on my Garmin, so I just bought the HRM-Run 4: https://buy.garmin.com/en-US/US/p/530376#overview
How does this work and how can I be sure that my watch connects to my HRM-Run every time I do a workout and NOT using the wrist hr monitor? Do I have to manually turn off the wrist heart rate monitor every time I go for a run?