Magellan AF0105SWXXX Magellan Heart Rate Monitor Provides real-time, accurate heart rate to compatible popular mobile training apps, including MapMyRun, RunKeeper, Runtastic, Strava and many more Bluetooth Smart technology provides accurate heart rate to any Bluetooth Smart ready device utilizing standard heart rate profile Machine washable comfortable soft chest strap fits most sizes Compatible with iPhone 4S+, iPod touch (5th generation), iPad (Air, Mini, 3rd & 4th generation) and iPod Nano (7th generation) and select devices using Android 4.3 or later Replaceable coin cell battery last up to 12 months with normal use patterns