Photo 1 of XOSS X2 Chest Strap Heart Rate Monitor Bluetooth 4.0, IP67 Waterproof Heart Rate Tracker Sensor, Wireless Heart Rate with Chest Strap Health Accessories

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Photo 1 of XOSS X2 Chest Strap Heart Rate Monitor Bluetooth 4.0, IP67 Waterproof Heart Rate Tracker Sensor, Wireless Heart Rate with Chest Strap Health Accessories