🔒【Multiple Ways To Unlock】Advanced 4-in-1 Keyless Entry Smart Door Lock: Fingerprint + Password + App + Key (2 included). One Touch Fingerprint Access, reads your fingerprint and unlocks your door. The auto relock function is designed to keep your home safe.
🔒【USB + Backup key, Never Get Locked Out】Low battery alarm on Tuya（Free APP, with emergency power interface and backup key. When the power is critically low or the battery is completely drained, don’t worry, use the backup key to open the door, micro USB power bank also can serve as a temporary power supply. (4pcs AA alkaline batteries NOT included)
🔒【Applicable Range and Use】The adjustable latch has a size between 2-3/8″(60mm) or 2-3/4″(70mm), and is suitable for doors with a thickness of 1-3/8″(35mm) to 2″(50mm). Simple door settings, suitable for various scenarios, replaces standard single-cylinder U.S. door locks, fits both left and right doors, inner and outer. Easy to install in minutes by following short installation video.