LEONDARX / Narrow Frame Smart Lock
LJ12 Automatic Narrow Frame Smart Lock
The LJ12 is a fully automatic smart lock built exclusively for narrow frame doors.
Access control. For the door profile.
Explore the application, daily use and installation requirements for this model.
A slim profile, properly installed.
Plan the lock on the door’s aluminium stile, with the handle and strike positioned for the opening direction.
- Fully Automatic Operation: Auto-locks and unlocks without manual effort
- Narrow Frame Compatibility: Engineered for 40mm+ profiles, fits 38mm-120mm door thickness
Define everyday access.
Select from this model’s documented access functions, then confirm credential management and the required version.
- IP67 Waterproof Protection: Dust-tight and water-resistant for harsh conditions
- Multi-Biometric Access: Face, palm vein and semiconductor fingerprint recognition
Match the lock to the door.
Check profile width, door thickness, lock body, strike and handle clearance. Confirm the exterior and interior assemblies together.
0Review model documents ↗The details behind the selection.
Specifications apply to this model. Confirm the hardware revision, optional functions and installation requirements before ordering.
The original manufacturer provides this model’s specifications as illustrated detail sheets. Open the original material below or request a matching technical sheet.
Open model material ↗COMPLIANCE DOCUMENTATION
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Request compliance documents ↗LJ12 Automatic Narrow Frame Smart Lock
Confirm applicable reports and declaration documents with the project team.Before you specify.
Installation and ordering questions for this model.
What should I confirm before ordering this model?+
Confirm the hardware revision and installation configuration for LJ12 Automatic Narrow Frame Smart Lock. Use the original model material below and request the matching technical sheet.
Will this lock fit my existing door?+
Check the door construction, thickness, opening direction, lock body and fixing pattern against the selected model. A site assessment and the matching drawing are needed before reusing existing door preparation.
Which documents are available for project review?+
Original manufacturer images and model detail sheets are retained below. Request current installation instructions, version-specific specifications and any applicable compliance documents for your market and ordered configuration.
Original model material.
Manufacturer views, drawings and original detail sheets remain available for a technical review.
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Original manufacturer description+
Original source material for reference. General service terms and version-dependent claims require confirmation for your order.
- Fully Automatic Operation: Auto-locks and unlocks without manual effort
- Narrow Frame Compatibility: Engineered for 40mm+ profiles, fits 38mm-120mm door thickness
- IP67 Waterproof Protection: Dust-tight and water-resistant for harsh conditions
- Multi-Biometric Access: Face, palm vein and semiconductor fingerprint recognition
- Large User Capacity: 100 faces, 100 palm veins, 100 fingerprints, 100 passwords, 100 IC cards
- Premium Build Quality: Aluminum alloy body with spraying finish, stainless steel lock body
- Reliable Power System: 4 AA batteries with 5V power bank emergency charging
- Wide Operating Temperature: Functions reliably from -25°C to +70°C
- Comprehensive Security: C-grade cylinder, anti-prying, wrong attempt and low voltage alarms
- Global Language Support: 13 languages for worldwide deployment
- Smart Connectivity: Optional remote unlock, mobile APP, WiFi and Bluetooth access
- Dummy Password Feature: Adds an extra layer of privacy and security
The LJ12 redefines convenience for narrow frame door access with its fully automatic design. No manual locking or unlocking is required, creating a seamless entry experience for users. It features an IP67 waterproof rating, ensuring durability in both indoor and outdoor settings. The lock integrates advanced biometric technologies including face, palm vein and fingerprint recognition, alongside traditional access methods and optional smart connectivity.
With support for 13 global languages, it is tailored for international markets, making it a versatile and secure solution for modern residential and commercial properties.
Start with the installation.
Share the door or room layout, target market, quantities and integration requirements. We can help define the model configuration.