Acer LIQUID LEAP ACTIVE User Manual page 8

6 - Setting up
overlapping each other with the clasp over the two holes that best fit
your wrist.
3. Squeeze both the clasp and the wristband between your thumb and
forefinger until the wristband is properly secured.
You'll know your Leap wristband is securely fastened if both tabs on
the clasp are fully inserted into the wristband.