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FITIV Pulse Heart Rate Monitor by MotiFIT Fitness Inc.
Nike+ to support Garmin, TomTom and other fitness trackers (update) | Engadget
Nike+ Heart-Rate Monitor On Sale June 1st | WIRED
Smart Watch Touch Bluetooth Heart Rate Fitness Sport Waterproof For Android iOS | eBay
Nike+ Running app updated with Apple HealthKit integration, elevation tracking, more | AppleInsider
How to Disable Heart Rate on Apple Watch - YouTube