The NUKI door lock is an electronic lock that runs on battery.
If you push the button, it will open the door for you. So does the keyboard on the outside. You can lock the door from the outside by pushing the little triangle. And of course you can use the key on the outside to lock/unlock the door.
You can also turn the ring to open or lock the door.
If the battery runs low, you can easily replace it with the second battery. ALWAYS HAVE THE DOOR OPEN WHEN CHANGING BATTERIES. It is in the kitchen in the left drawer. One pack is black and one pack is white to keep track which one needs to be charged. There is also a charger with a usb c cable. Please be so kind and charge the empty battery for its next use. The LED will light up once it is charging.
