{"product_id":"spherical-fingerprint-lock","title":"Smart Biometric Fingerprint Door Knob – Keyless Entry Electronic Knob with Touchscreen Keypad \u0026 App Control","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-in-1 Keyless Access:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLuxury Diamond-Knurled Metal Grip:\u003c\/strong\u003e Precision CNC-machined diamond knurling provides high tactile grip, refined architectural aesthetics, and fingerprint smudge resistance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmart App Management (Tuya \/ TTLock):\u003c\/strong\u003e Generate time-bound guest passcodes, one-time OTP codes, view real-time unlocking records, and check battery levels directly from your smartphone.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassage Mode (Always Open):\u003c\/strong\u003e Quickly switch the knob to free-passage mode during parties or high-traffic hours to allow unrestricted entry without re-authenticating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-Peep Virtual PIN Protection:\u003c\/strong\u003e Enter random digits before or after your real passcode to shield your credentials from prying eyes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Retrofit Installation:\u003c\/strong\u003e 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmergency USB Backup:\u003c\/strong\u003e Concealed physical keyhole and Type-C \/ USB emergency power port ensure continuous access even if batteries run out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Smart Biometric Electronic Door Knob Lockset\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnlocking Methods:\u003c\/strong\u003e Biometric Fingerprint, Touchscreen Passcode, Smartphone App, Mechanical Key\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmart Platform Support:\u003c\/strong\u003e Tuya Smart \/ Smart Life \u0026amp; TTLock (Bluetooth \/ Optional WiFi Gateway)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFingerprint Sensor:\u003c\/strong\u003e 360° Semiconductor Biometric Scanner (FAR \u0026lt;0.001%, FRR \u0026lt;0.1%)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFingerprint \u0026amp; Passcode Capacity:\u003c\/strong\u003e Up to 50–100 User Fingerprints \u0026amp; Custom PINs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Heavy-Duty Die-Cast Zinc Alloy \u0026amp; High-Strength Brass Cylinder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Options:\u003c\/strong\u003e Matte Obsidian Black and Moonlight Satin Silver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLatch Backset:\u003c\/strong\u003e Adjustable 60 mm \/ 70 mm (2-3\/8\" or 2-3\/4\") Tubular Latch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoor Thickness:\u003c\/strong\u003e 35 mm to 55 mm (approx. 1-3\/8\" to 2-3\/16\")\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Type:\u003c\/strong\u003e 4 x AAA Alkaline Batteries (6–10 months regular battery life)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmergency Interface:\u003c\/strong\u003e Type-C USB Port for external power jump-start\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWholesale \u0026amp; OEM Capabilities\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Finishes:\u003c\/strong\u003e Available in Matte Black, Moonlight Silver, Satin Brass, and Gunmetal Gray.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Laser Engraving:\u003c\/strong\u003e Custom logos on rosettes or packaging for architectural hardware distributors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Export Packaging:\u003c\/strong\u003e Protective foam master cartons with full drill-hole templates, latch assemblies, strike plates, keys, and installation guides.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB2B Supply:\u003c\/strong\u003e Factory-direct wholesale pricing from Ningbo Dimon, CE\/FCC international certifications, low MOQ, and full ocean\/air freight logistics.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ningbo Dimon Metal Products Co.,Ltd","offers":[{"title":"The smart ball lock is matte black","offer_id":47628651987083,"sku":null,"price":294.0,"currency_code":"USD","in_stock":true},{"title":"The smart ball lock is in moonlight silver","offer_id":47628652019851,"sku":null,"price":278.0,"currency_code":"USD","in_stock":true},{"title":"Ball lock split type moonlight silver","offer_id":47628652052619,"sku":null,"price":305.0,"currency_code":"USD","in_stock":true},{"title":"Ball lock split type matte black","offer_id":47628652085387,"sku":null,"price":305.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/0295\/7707\/files\/87b8afc1ddfcfd0139358e6b0bb48bb9.jpg?v=1790131192","url":"https:\/\/nbdimon.myshopify.com\/zh\/products\/spherical-fingerprint-lock","provider":"Ningbo Dimon Metal Products Co.,Ltd","version":"1.0","type":"link"}