A look at the new Polar Beat Bluetooth Smart app with H7 Heart Rate Strap | DC Rainmaker
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POLAR T31 Coded Chest Transmitter and Elastic Strap, Transmits heart rate data to Polar heart rate monitors using 5kHz transmission and compatible gym equipment..., By Visit the POLAR Store - Walmart.com
NIP Polar T31 Non-Coded Transmitter Set, Model 3920132, Size M 725882201320 | eBay