Features?? BatteryLife.540daysbatterylife,Safeandstablenotoffline. Black Technology Doubles Security.From the lock body to the rear panel, everything isdesigned with advanced security from the user'spoint of view. Financial-grade fingerprint recognition.Using 3D semiconductor fingerprintrecognition technology, equipped withSwedish PB company fingerprint algorithm, effectively eliminates fake fingerprints. True mortise C-class lock cylinder. The lock cylinder runs through the lock body, effectively preventing violent unlocking. Intelligent linkage. When opening the door, the lights and curtains areslowly opened, and the air conditioner and floorheating are adjusted to the appropriate temperature.Specification??Name: Aqara Smart Door LockA100 ProModel: ZNM S02ESSize: 375*7 7*23.6 mmWireless Connectivity: Zigbee, BT 5.0Battery specification: AAalkaline dry batteryEmergency power supply: Type-C5V DC external power supplyUser capacity: 75 sets ofcommon passwords and temporary passwords, 25 NFC devices, 50 fingerprintsLock cylinder