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Tracks heart rate and calories burned as you work out Works with the Wahoo Fitness App, Strava, MapMyRun, Endomondo, Runkeeper and more Apps Long Battery Life – replaceable coin cell battery lasts 12 months Built for Comfort and Ease of Use – adjustable elastic heart rate strap and two snap connection for easy on/off Includes …

Read moreWahoo Fitness Run/Gym Heart Rate Monitor for iPhone 4/4S