The Nuki Smart Lock 3.0 Pro turns your smartphone into a smart key. The electronic door lock is installed over your existing lock cylinder from the inside in a matter of minutes and is not visible from the outside. With the free app (iOS/Android), you can open and close your door without a key. You can create up to 200 permanent, time-limited or recurring virtual keys with the Nuki app. This means your family and friends, dog sitters and cleaning staff have access exactly when you want. You can manage these access permissions on the go and always keep an eye on your door from a distance. It meets the highest possible security standards thanks to state-of-the-art encryption mechanisms. If required, you can remove your Nuki Smart Lock without leaving a trace, making it ideal for rental properties. The Nuki Door Sensor can be installed on the interior side of your door in just a few simple steps without any drilling or screwing. When combined with the Nuki Smart Lock 3.0 (Pro) and the fre