The Aqara Smart Lock U200 supports Apple Home Key and allows unlocking by proximity to an iPhone or Apple Watch (NFC). Various unlocking methods, such as a PIN code, NFC key card, smartphone, and fingerprint, provide security. Temporary passwords can be created for guests. Seamless integration into smart home systems, compatible with the Aqara Video Doorbell, allows door opening via app or voice control (Alexa, open the door). The U200 locks and unlocks quietly and automatically, with automatic locking when leaving the house. IPX5 certification ensures reliable operation in temperatures from -15°C to 66°C. The included battery can be charged while in use to ensure uninterrupted functionality.