Overview

The Ningbo Dimon Smart Biometric Fingerprint Door Knob is a modern, high-precision electronic lockset designed for interior bedroom doors, executive home offices, Airbnb rental suites, and apartment rooms. Featuring an architectural round knob with a luxury diamond-knurled grip, this smart knob integrates advanced semiconductor biometric fingerprint sensing and a circular backlit touchscreen digital keypad directly onto the exterior knob face. Compatible with Tuya Smart and TTLock mobile apps via Bluetooth/WiFi, it replaces standard traditional round door knobs in minutes without extra drilling.

Key Features

• 4-in-1 Keyless Access: Unlock in under 0.3 seconds via semiconductor biometric fingerprint recognition, touch-activated circular PIN passcode keypad, smartphone app (Tuya Smart / TTLock), or emergency mechanical keys.
• Luxury Diamond-Knurled Metal Grip: Precision CNC-machined diamond knurling provides high tactile grip, refined architectural aesthetics, and fingerprint smudge resistance.
• Smart App Management (Tuya / TTLock): Generate time-bound guest passcodes, one-time OTP codes, view real-time unlocking records, and check battery levels directly from your smartphone.
• Passage Mode (Always Open): Quickly switch the knob to free-passage mode during parties or high-traffic hours to allow unrestricted entry without re-authenticating.
• Anti-Peep Virtual PIN Protection: Enter random digits before or after your real passcode to shield your credentials from prying eyes.
• Standard Retrofit Installation: Direct DIY replacement for standard US/European interior cylindrical door knobs; fits 35mm – 55mm (1-3/8" to 2-3/16") door thicknesses with an adjustable 60mm/70mm latch backset.
• Emergency USB Backup: Concealed physical keyhole and Type-C / USB emergency power port ensure continuous access even if batteries run out.

Technical Specifications

• Product Type: Smart Biometric Electronic Door Knob Lockset
• Unlocking Methods: Biometric Fingerprint, Touchscreen Passcode, Smartphone App, Mechanical Key
• Smart Platform Support: Tuya Smart / Smart Life & TTLock (Bluetooth / Optional WiFi Gateway)
• Fingerprint Sensor: 360° Semiconductor Biometric Scanner (FAR <0.001%, FRR <0.1%)
• Fingerprint & Passcode Capacity: Up to 50–100 User Fingerprints & Custom PINs
• Material: Heavy-Duty Die-Cast Zinc Alloy & High-Strength Brass Cylinder
• Finish Options: Matte Obsidian Black and Moonlight Satin Silver
• Latch Backset: Adjustable 60 mm / 70 mm (2-3/8" or 2-3/4") Tubular Latch
• Door Thickness: 35 mm to 55 mm (approx. 1-3/8" to 2-3/16")
• Battery Type: 4 x AAA Alkaline Batteries (6–10 months regular battery life)
• Emergency Interface: Type-C USB Port for external power jump-start

Wholesale & OEM Capabilities

• Custom Finishes: Available in Matte Black, Moonlight Silver, Satin Brass, and Gunmetal Gray.
• OEM Laser Engraving: Custom logos on rosettes or packaging for architectural hardware distributors.
• Complete Export Packaging: Protective foam master cartons with full drill-hole templates, latch assemblies, strike plates, keys, and installation guides.
• B2B Supply: Factory-direct wholesale pricing from Ningbo Dimon, CE/FCC international certifications, low MOQ, and full ocean/air freight logistics.