All in One Keyless Keypad Fingerprint Biometric Deadbolt Door Lock 100 User Capacity ALL-IN-ONE FLEXIBILITY: Up to 100 fingerprints, 100 user codes and 2 Schlage C Key mechanical keys. Add or delete individual users directly at the keypad MULTIPE USES: Users defined 4-12 digit codes, suitable for home, office, workplace and so on, works well for kids and the elder LOCKOUT FEATURE: When user turn on lockout feature, fingerprint, code and even key wouldnt unlock the lock from outside. It is pick or bump proof in this situation NECESSARY REQUIREMENTS: Fit door thickness between 1-3/8" and 1-7/8", operation temperature from -4 F to 151 F QUALITY GUARANTEE: One year limited manufacturers warranty DESIGNED IN USA Unlock by fingerprint, code, or key. Individual fingerprint user and user code deletion. Build-in touch active sensor: one touch to unlock. Self-learning ability: fingerprint template is updated after every fingerprint entry. Operation temperature from -4F (-20C) to 151F (66C). Beeper sound turn off option, you may turn off beeper sound if you dont like. Low battery alert: when short quick beeping and red light flash occur during operation. Memory function: power run-out or system reset will not cause the loss of enrolled fingerprint(s) and user code(s).