Please note that the original version of the athletic strap (v1) requires inserting the Lief into the strap pocket and using the stickers. Check to see which version of the strap you have by confirming whether your Lief can be snapped into the strap (v2, detailed below) or must be inserted into a pocket (v1).

1. With your Lief attached, adjust the strap length so it can fit snugly around your torso

2. If you're not already sweaty, remove the strap and dab water on the sensors to activate them:

3. Snap in your Lief to both ends of the strap.

4. Position the strapped Lief on the upper center of your torso.

5. Pair your Lief to the app with Bluetooth to see your real-time HRV data.