TeeHO AZ06 Smart Door Lock lets you go keyless with your door, using your fingerprint, passcode, or the TTlock app to unlock. Lock and unlock your door remotely using the app. Grant access to guests with temporary or permanent passcodes. Receive notifications when the door is unlocked, and check the unlock history. The fingerprint sensor can store up to 50 unique fingerprints. The passcode keypad can store up to 100 unique passcodes. The lock is powered by 4 AA batteries, which can last up to 1 year, and it has a low battery indicator.