Cardio belt: the Polar H9 heart rate sensor at 41 €
2023-09-04 08:49:39 The Polar H9 heart rate sensor belt is on sale at Amazon: the accessory loses 10% during a flash sale and returns at €41.30. This promises reliable real-time heart rate measurement and is waterproof up to 30 meters. Note that the models sizes XS-S et M-XXL are both on sale. Polar H9. Battery … Read more