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How to take your resting heart rate with the doppel app
Why You Should Measure Your Resting Heart Rate
Utilizing Intensity Minutes with Your Wearable
How to pair to your doppel - Method 1: Using the charging base
How to pair to your doppel - Method 2: Using the pairing gesture
How to reset or update the firmware on your doppel
doppel - Feel calm and focused, naturally
The Doppel Wristband can Literally Change Your Mood | WIRED
How to adjust doppel’s strap
Wristband for controlling stress
doppel - Feel calm and focused, naturally
Doppel - A New Breed of Wearable Technology | WIRED