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Access by TTlock App, Fingerprint, M1 Card, Passcode, Wristband, or key. The auto-lock function would help you if you forgot to lock your door, through APP, you could check the unlocking records, also you can share the temporary code with visitors, nannies, housekeepers, tenants, guests, etc. It's the best smart lock for Airbnb or short-term renting apartments.