Polar H1 Heart Rate Sensor with new battery (without chest strap) 725882555102 | eBay
Polar H9 HR Heart Rate Sensor, Black | Bikeinn
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
Polar H7 Bluetooth Smart Heart Rate Chest Transmitter – HeartRateMonitorsUSA.com
Polar H10 Heart Rate Monitor: Very Long Term In-Depth Review | DC Rainmaker