Here is a armband heart rate monitor with a built-in accelerometer that helps you track your workouts. The Rhythm+2.0 can be used on your upper forearm, biceps or triceps. It connects to ANT+ and Bluetooth devices. It has a rechargeable battery life that lasts up to 24 hours.
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This heart rate monitor is waterproof. It is compatible with over 200 fitness apps. The armband is soft, stretching, and easily adjustable. You can find out more about it here.
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