The ZF-4 Smart Door Lock is reliable with  its key features:
Material and Design: Made from durable aluminium alloy with a sleek black finish.
Dimensions and Weight: Measures 350 by 70 mm and weighs 1.7 kg.
Door Compatibility: Fits door thicknesses from 35 to 110 mm.
Unlocking Methods: Offers fingerprint recognition, password entry, card access, and traditional keys.
Fingerprint Storage: Can store up to 100 fingerprints.
Operating Systems: Compatible with iOS 7.0 and above, and Android 4.4 and above.
Battery Life: Rated for 10,000 uses, approximately 12 months, powered by four standard no. 5 dry batteries.
Operating Temperature: Functions effectively between -20 to 60 degrees Celsius.