![Amazon.com : Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors Amazon.com : Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors](https://m.media-amazon.com/images/I/51LhhgJ+1lL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors
![PolarGlobal on Twitter: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover PolarGlobal on Twitter: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover](https://pbs.twimg.com/media/EPczYh_XUAAja_R.jpg)
PolarGlobal on Twitter: "Today we've launched a new heart rate sensor: Polar H9! - Bluetooth, ANT+ and 5 kHz technologies - Battery life of 400 hours - Compatible with Polar Club Discover
![Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M : Electronics Amazon.com: HQRP 4-Pack Lithium Battery Compatible with Polar FT40 FT40M H7 H10 Heart Rate Monitor FT4O FT-40 FT-40M : Electronics](https://m.media-amazon.com/images/I/51UrhUV4fvL._AC_.jpg)