The CLV028 is the definitive solution for architectural “invisible” entrances, slatted (grille) feature walls, and high-security secret compartments. Designed to be mounted entirely on the interior, it leaves the exterior facade of your door completely untouched and free of hardware.

1. Core Operation & Access Control

• Invisible Master Hub: A “zero-footprint” design that supports encrypted App Control, NFC Card, Wireless Remote, and high-precision Biometric Fingerprint unlocking.
• Real-Time Status Alerts: Integrated low-battery logic provides early-warning acoustic signals and push notifications to your smartphone.
• Precision Reversible Latch: A symmetrical lock body design that allows the latch tongue to be adjusted for Left-Hand or Right-Hand door swings without ordering different parts.

2. Fail-Safe & Emergency Engineering

• Smart Anti-Lockout Logic: To ensure life safety, the CLV028 features a Proactive Unlock System. If battery levels drop to a critical point and warnings are ignored, the lock automatically retracts the bolt to prevent users from being trapped inside a secret room.
• Triple-A Power Efficiency: Optimized for low energy consumption using 3x AAA Alkaline batteries (included), providing a standby life of approximately 10–12 months.
• Mechanical Bypass (Emergency Wrench): Every CLV028 includes a specialized high-tensile wrench. By utilizing a discreetly drilled Emergency Access Hole, you can manually override the motor and retract the latch even during a total electronic failure.

3. Installation & Versatility

• Non-Handed Architecture: Simplifies inventory and installation. No need to pre-determine door handing; the internal mechanism is universal.
• 180° Hex-Key Adjustment: Simply use the provided hex key to rotate the latch 180° to match the strike plate of your door frame.
• M8 Spindle Compatibility: Designed to fit standard 8mm x 8mm (M8) square spindles, allowing you to pair the internal lock body with a wide variety of architectural handles or “dummy” pulls.

Product Features & Operation

1. Invisible Smart Lock (Main Cover)

• Supports: App/NFC, Remote Control, and Fingerprint unlocking.
• Low Battery Alert: Automatic reminders when power is low.
• Reversible Latch: The lock tongue can be adjusted for left or right-handed doors.

2. Battery & Emergency Access

• Anti-Lockout System: The lock automatically unlocks when power is critically low to prevent you from being trapped.
• Batteries Included: Comes with 3 AAA alkaline batteries.
• Low Power Alarm: An audible alarm will sound to remind you to replace batteries.
• Emergency Wrench: Includes a specialized wrench to manually unlock the door in case of electronics failure.

3. Installation & Versatility

• Non-Handed Design: No need to distinguish between left or right during installation.
• 180° Rotating Latch: Simply use the provided hex key to flip the latch direction.
• Emergency Hole: A small hole must be drilled through the door (opposite the handle) to allow for manual emergency unlocking.

Mandatory Emergency Hole Guide

The manual emphasizes that the Emergency Hole is vital for “Scenario 2” (doors with a 7-shaped frame structure) and highly recommended for others. This hole allows the specialized wrench to reach the mechanism if the electronics fail.