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Amazon.com: BoxWave Cable Compatible with Polar M400 (Cable by BoxWave) - Micro USB DuraCable, Braided Micro USB Charging Cable for Polar M400 - Space Grey : Electronics
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MultiCharge Polar M400 MicroUSB Cable - Multiple Charging Cable Micro USB Cable (Polyurethane Cable) – BoxWave
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Polar M400 Cable, BoxWave® [Colorific Magnetic Mini Cable] Colorful Mini Micro USB Cable for Polar M400, A360, V650 - Cosmo Pink : Amazon.ca: Electronics
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