Go to My sites. Choose your current site. Site name, address and main contractor is shown. Here you can also choose to check in to the site, but thats not a requirement for using the Ease Smart Lock in the next step.

Choose Locks in the menu bar. All available locks on the site are shown, and when they are possible to lock/unlock according to their schedule.

Select the lock you want ot lock/unlock. The Bluetooth indicator will show if you are close enough to the lock to operate it.

Use buttons Unlock and Lock to operate the lock in question.

Remember to lock the door when you are done and leaving the site.