POLAR Heart Rate Sensor H1 Watch Compatible Bluetooth Smart Monitor, New Battery | eBay
Polar H7 Bluetooth Heart Rate Transmitter w/ HRM USA Strap – HeartRateMonitorsUSA.com
Amazon.com: TUDIA EVA Empty Case for Heart Rate Monitor with Chest Strap Compatible with Polar H10 [Case ONLY, Device NOT Included] : Sports & Outdoors