Acer Liquid Leap Active Manuel D'utilisation page 17

7. Enter the four characters into Acer Leap Manager when requested
and tap Next. Confirm the code is correct and tap Yes.
Note
If necessary, your Leap device's firmware will be updated. This may take
some time. Be careful to keep your Leap device close to your smartphone
until the update is complete.
8. You will be asked to give permission for the Leap device to connect
via Bluetooth.
Use with an iPhone - 15