‎4 AA batteries required.

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[Code Flexibility] Generate 5 different types of codes to satisfy your access needs. Use your Smart Lock app to generate and send Permanent, Custom, Temporary, Cyclic, and One-Time codes, making it more flexible for children, friends or others who wants to entry, bring you a brand-new smart home experience.
[Learnable Fingerprint Unlocking] Unlock the door less than 0.3 seconds with our next generation marchine learning fingerprint access technology. The most secured 6-in-1 Keyless Entry Smart Door Lock: Fingerprint + Passcode + Key Card + Wireless Fob + Smartphone + Key.