![Amazon.com : POLAR H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black : Sports & Outdoors Amazon.com : POLAR H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black : Sports & Outdoors](https://m.media-amazon.com/images/I/71ttT1NCxYL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : POLAR H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Black : Sports & Outdoors
![In case anyone is interested: AW sensor (up) vs. heartbeat monitor - Polar H10 (down) during 2 CrossFit trainings. : r/AppleWatch In case anyone is interested: AW sensor (up) vs. heartbeat monitor - Polar H10 (down) during 2 CrossFit trainings. : r/AppleWatch](https://i.redd.it/di3ht3vnpdj11.jpg)
In case anyone is interested: AW sensor (up) vs. heartbeat monitor - Polar H10 (down) during 2 CrossFit trainings. : r/AppleWatch
![Amazon.com : Polar H10 Heart Rate Monitor – ANT +, Bluetooth - Waterproof HR Sensor with Chest Strap - Built-in Memory, Software Updates - Works with Fitness apps, Cycling Computers, Sports and Amazon.com : Polar H10 Heart Rate Monitor – ANT +, Bluetooth - Waterproof HR Sensor with Chest Strap - Built-in Memory, Software Updates - Works with Fitness apps, Cycling Computers, Sports and](https://m.media-amazon.com/images/I/61phVXYsYEL._AC_UF350,350_QL80_.jpg)