ZKTeco AL20B Smart Door Lock with Fingerprint, Keypad, RFID & Bluetooth App​

ZKTeco AL20B Smart Lock – Fingerprint, Keypad, RFID & Bluetooth Mobile App Control​

The ZKTeco AL20B smart door lock is a multi‑function lever lock that upgrades traditional doors with secure, keyless access. It combines biometric fingerprint recognition, PIN code entry, RFID card access, and Bluetooth app unlocking in one compact device, making it suitable for residential and light commercial use.​

Design & build

• Slim 30 mm (approx.) thin body for a clean, modern look on most doors.
• Zinc‑alloy construction for durability and a premium finish.​
• Reversible handle that can be installed on both left‑hand and right‑hand opening doors.​

Access methods

• Fingerprint sensor for quick and secure biometric unlocking.
• Touchscreen keypad for numeric PIN codes, with random “virtual digits” to prevent people from guessing your real code by fingerprint smudges.​
• RFID card reader allowing registered proximity cards or tags to open the door.​
• Bluetooth connection to a mobile app so you can control access directly from your smartphone.​

Smart functions & security

• Lock‑out mode that blocks general users and only allows admin access when enhanced security is needed.​
• Anti‑peep password entry where you can add random digits before or after the real PIN to stop shoulder‑surfing.​
• Low‑battery warning to remind you to replace the batteries in time.​
• Illegal‑operation alarm that triggers when repeated wrong attempts are detected.​

Power & backup

• Powered by standard AA batteries (user‑replaceable), providing months of normal operation.​
• The external 9V emergency power interface lets you temporarily power the lock from outside if the internal batteries are drained, so you can still unlock and replace them safely.​

Application scenarios

• Apartments and private homes wanting convenient, keyless entry with multiple users.
• Small offices and studios where staff need fingerprint or card access.
• Airbnb and rental properties where codes and users change frequently and need easy management