5-in-1 Unlocking Methods: Fingerprint: High-speed semiconductor sensor (<0.5s recognition). Passcode: Anti-peeping touch keypad (supports "scrambled" digits to hide your real PIN). IC Card: Encrypted RFID cards/tags for easy tap-and-go access. Tuya / Smart Life App: Remote unlocking, temporary codes, and access logs. Mechanical Key: Hidden manual override for emergency use. Power Supply: Runs on 4 × AA alkaline batteries (typically lasts 10–12 months). Emergency Power: Features a Micro-USB or USB-C port at the bottom for emergency power if batteries die. Security Features: Built-in alarm for multiple failed attempts and "Privacy Mode" (locking from the inside). Build Material: Durable Aluminum Alloy with a matte brushed finish. Compatibility: Fits door thicknesses between 35mm and 55mm; handle is reversible for both left-handed and right-handed doors.