1. Press the start button
2. Put the host’s fingerprint, have passed if the green light on
3. Press the register point at the back of lock
4. Put the guest’s fingerprint into collection windows twice until the green light on.

1. Press the start button.
2. Put the guest’s fingerprint into the Collection window until passed.
3. After passed then press the delete button in the back.
4. Put the fingerprint into it again until the green light on that this fingerprint has been deleted.

1. Press the start button
2. Put the host’s fingerprint into the collection window to get pass.
3. Press the delete button in the back
4. Put the host’s fingerprint into it until the green light on that all guest’s fingerprint deleted

1. Open the lid, checking the batteries.
2. Total four batteries
3. When the batteries used off, you can use 9V Spare battery.
4. Can use the key if you don't have another way.