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Polar T34 / T31 Non-Coded Chest Transmitter and Elastic Strap
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![Amazon.co.jp: Polar (pora-ru) [Japan genuine] T31 °C Transmitter 92053125 Black : Sports & Outdoors](https://m.media-amazon.com/images/I/615tkGylHVL.jpg "Amazon.co.jp: Polar (pora-ru) [Japan genuine] T31 °C Transmitter 92053125 Black : Sports & Outdoors")
Amazon.co.jp: Polar (pora-ru) [Japan genuine] T31 °C Transmitter 92053125 Black : Sports & Outdoors
Polar heart rate sensors | Change the battery - YouTube
Miten sykesensorin paristo vaihdetaan? | Polar Suomi
