Smart Lock 3.0 Pro EU Cylinder. The Nuki Smart Lock 3.0 Pro for Euro profile cylinders turns your smartphone into a smart key. This electronic door lock is installed on the inside of your door over the existing locking cylinder in just a few minutes and is not visible from the outside. With the free app (iOS/Android), you can unlock and lock your door keylessly. You can create up to 200 permanent, temporary, or recurring virtual keys with the Nuki app. These access permissions can be managed remotely, allowing you to keep an eye on your door from afar. You can easily remove your Nuki Smart Lock without leaving any traces, making it ideal for rental properties. Simple installation on the inside of the door without drilling or screws, within 3 minutes. Encrypted and certified security for your door lock. Automatic unlocking and locking of your door thanks to the "Auto Unlock & Auto Lock" feature. Grant up to 200 permanent, temporary, or recurring virtual keys with the Nuki app to family, friends, dog sitters, and cleaning staff. Experience maximum convenience and manage your door remotely through the integrated WiFi module. Up to 6 months of autonomous power supply from the built-in rechargeable Nuki Power Pack. High-quality manufacturing and elegant design of the knob with aluminum finish. Supports Apple HomeKit (Siri), Amazon Alexa, Google Home, and other smart assistants. Compatible with smart home services and smart doorbells. Conveniently controllable via Android Wear, Apple Watch, Tizen OS, Huawei Harmony OS, and Garmin Watch OS. Compatible with common knob cylinders. 1 adapter for Dormakaba/Kaba (yellow) included in the package. Other adapters can be ordered separately. Important note: If you are using the Nuki Opener along with the Smart Lock 3.0 Pro, you will also need the Nuki Bridge.