Amazon.com: Polar Pacer Pro - Advanced GPS Sports Watch, Wrist Heart Rate Monitor, Smart Watch for Men and Women, Workout Running Watch, Training Program & Health Recovery Tools, Sleep Monitor & Activity
Polar M400 poco uso de segunda mano por 45 EUR en Bilbao en WALLAPOP
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Polar M400 Activity Tracker | eBay
User manual Polar M400 (English - 100 pages)
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Amazon.com: Polar Pacer Pro - Advanced GPS Sports Watch, Wrist Heart Rate Monitor, Smart Watch for Men and Women, Workout Running Watch, Training Program & Health Recovery Tools, Sleep Monitor & Activity