1, Unlock by TTlock via bluetooth
Unlock via bluetooth has distnace limited, it is about 10-15m. When you are within this range, you can use the cell phone app to unlock it.
2, Unlock by TTlock via wifi
The lock will need connect to wifi gateway. The TTlock appo can remotely unlock it at any time anywhere, no distance limited. (The wifi gateway is $25/pcs.)
3, Unlock by Password
The TTlock app can authorize the passwords to visitors remotely. No need wifi function, just turn on the bluetooth. The lock support password proection. You can input any code before or after the right code.
4, Unlock by keys
Hidden key hole design. Easy to take over the key cover, then you can use the key to unlock.
5, Auto Locked
It will auto locked after unlock 5s. Or you can set the time in the app.
This lock can replace the knob lock directly.