Get the most out of your workout with the Garmin HRM-Run’s minute-by-minute feedback on effort levels and built-in accelerometer to measure running form out on the road. The sensor is supported by a soft, adjustable strap and transmits data wirelessly to your Garmin Forerunner 620/920XT or fenix 2 device so you can see heart rate, cadence, vertical oscillation, and ground contact time to accurately measure your intensity levels and form metrics. While the HRM-Run only sends running form feedback to the previously mentioned devices, it’s compatible with other Garmin devices to accurately display and track heart rate data. These devices include the D2 Bravo, epix, fenix 3, and fenix 3 Sapphire. It runs for one year when used an average of one hour per day, and its standard, CR2032 battery is easily replaceable with a trip to the neighborhood grocery store.