Introducing the Tuya App Digital Automatic Smart Lock (DF04), a versatile and secure locking system that offers multiple unlocking options. This lock can be unlocked using TUYA, fingerprint, password, card, or key. Made with high-strength aluminium alloy material, it is resistant to corrosion and durable. The lock has an environmentally friendly battery power supply, and it can hold up to 300 fingerprints, passwords, and IC cards for easy input. It also has an automatic closing feature that will lock the door once it has been closed. In an emergency, the lock comes with keys when the battery power runs out or the system malfunctions. The fingerprint, password, and IC card data will not be lost even if the lock loses power, and it comes with a USB port for emergency charging. The lock also has an alarm system that will sound when the power is low or if there are unsuccessful attempts at unlocking it. The product is compatible with door thicknesses ranging from 35-90mm and is available in grey or gold. It supports IOS 7.0 or above and Android 4.4 or above. The battery life is 12000 times, equivalent to 18 months or more. The working voltage is 7.2V～8.4V, and the working temperature ranges from -20 to 65 ℃ while the humidity ranges from 10% to 90%. The product size is 75*410mm and weighs 3.6 kg. The lock can be unlocked using a fingerprint, password, card, mechanical key, or the Tuya app, and it also has a control unlock feature.