The Aqara U200 smart lock makes your home more secure and life easier. It gives you keyless entry without messing up with your door - just place it on top of your existing lock, no drilling needed. There's an NFT tag for quick access, a PIN option for back up, and it works perfectly with Matter, so it slots right into your smart home setup. You can set your smart lock to automatically lock after a preset time using the Aqara Home app. Use the Aqara M3 hub to control, unlock, get real time alerts on your phone and do a whole host of things remotely.Good to know- You can generate one-time password to open the lock even if the hub goes offline- IPX5 waterproof rating, which makes it suitable for both indoor and outdoor use- Assign permanent, temporary, or scheduled access to multiple users in your office or household- It is compatible with Apple Home, Amazon Alexa andSamsung SmartThings - Track, timestamp, and record the identity of every user who enters and exits your building- You can activate the Quiet Unlock mode right from the keypad.