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.
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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