High-security biometric/fingerprint open smart aluminium door lock, tuya phone app, card swipe, touch screen password, and standard-key. other functions include intelligent anti-theft, scramble pin code, and usb emergency charging function, which keeps your house away from danger and theft. this door lock can be used on aluminium doors it is made of aluminum alloy. it uses semiconductor fingerprint recognition, which can recognize and open the door successfully in less than 0.4 seconds, it keeps record of entrance through a mile app. meanwhile, it has a very high fingerprint recognition rate, both for the elderly and children.