HRM-Pro heart rate transmitter -- This premium heart rate strap tracks runs, swims and more. It transmits real-time heart rate data over ANT+ connectivity and Bluetooth Low Energy technology, giving you more training options -- The device stores heart rate data during swimming or other activities while your watch is out of range, then sends that data to your watch once the activity is finished -- HRM-Pro features a small, lightweight heart rate monitoring module that is no wider than the width of the soft, comfortable strap
Specifications of Garmin HRM-Pro™ Premium Heart-rate Monitor with Dual Transmission and Running Dynamics, Black
