According to official information, the KESO door knob adapter is suitable for the Nuki Smart Lock 2.0. For the new generations such as the Nuki Smart Lock 3.0 or 3.0 Pro, a specific adapter is required that is explicitly designed for these models. Compatibility with the latest generation Pro model is therefore not guaranteed. Please note that a different adapter is recommended for the Nuki Smart Lock 3.0 or 3.0 Pro, which has been specially developed for these models.

Yes, the Nuki door knob adapter KESO is compatible with the 4th generation of the Nuki Smart Lock.

You have to pay shipping and wait longer. I threw them into a bigger order I placed here and got them the next day.

Yes, worked on Nuki 3.0.