{"product_id":"fingerprint-door-lock-black-smart-biometric-door-knob-1-pack","title":"Fingerprint Door Lock Black - Smart Biometric Door Knob 1 Pack","description":"\u003cp\u003eOur review of the Fingerprint Door Lock Black finds it best for homeowners who want a compact, keyless upgrade for interior or apartment doors while keeping a fallback key option. The single biggest reason to consider this smart door knob is its simple, three-mode operation and on-device fingerprint sensor that stores up to 50 prints, offering fast hands-free entry for daily use. Installation is straightforward with a screwdriver, the rechargeable battery removes hassles, and an app provides local Bluetooth control for basic management.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 Modes Smart Door Knob:\u003c\/strong\u003e Rotating the thumb around the knob switches between passage, entrance, and privacy modes to fit bedroom or entry needs without complex setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-in-1 Access:\u003c\/strong\u003e You get fingerprint, app control via Bluetooth, and a traditional key for reliable backup access when needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocal Biometric Security:\u003c\/strong\u003e The lock stores fingerprints locally for privacy and can hold up to 50 fingerprints so the household can share access without cloud storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRechargeable Battery:\u003c\/strong\u003e A built-in 400mAh battery recharges in 3 to 4 hours via USB A-to-C so you avoid frequent battery replacements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Installation:\u003c\/strong\u003e Designed to fit most US doors and installed with basic tools, the knob is suitable for a homeowner comfortable with a screwdriver.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Fingerprint Door Lock Black is aimed at renters and homeowners who want a smart, compact door knob for bedrooms, apartments, or interior doors where privacy and quick fingerprint access matter. The combination of biometric entry and a key backup makes it practical for families or shared living spaces where multiple users need reliable access.\u003c\/p\u003e\u003cp\u003eIt is less suitable for exterior doors that require full weatherproofing or for users who need remote Wi-Fi control right away, since Wi-Fi requires a separately sold gateway and the app functions within Bluetooth range only.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEasy to install and praised by customers for clear instructions and quick setup.\u003c\/li\u003e\n\u003cli\u003eConvenient fingerprint unlocking with storage for up to 50 fingerprints for household access.\u003c\/li\u003e\n\u003cli\u003eIncludes app control via Bluetooth and a physical key for dependable backup entry.\u003c\/li\u003e\n\u003cli\u003eRechargeable battery and visible power display reduce maintenance surprises.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers reported mixed build quality and occasional lock functionality issues, so longevity may vary by unit.\u003c\/li\u003e\n\u003cli\u003eApp control works only within Bluetooth range and Wi-Fi needs an additional gateway purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eFingerprint door knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFingerprint capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 50 fingerprints\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBuilt-in 400mAh rechargeable (USB A-to-C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModes\u003c\/td\u003e\n\u003ctd\u003ePassage, Entrance, Privacy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp control\u003c\/td\u003e\n\u003ctd\u003eBluetooth only (Wi-Fi via optional gateway)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFits most US doors, screwdriver required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Fingerprint Door Lock Black is a practical, value-minded smart door knob for interior and apartment doors, offering fast biometric entry, a Bluetooth app for local management, and a physical key backup. It represents good value for those who prioritize convenience and privacy, but buyers seeking heavy-duty exterior hardware or built-in Wi-Fi should look elsewhere or add the gateway.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan the lock be controlled remotely?\u003c\/strong\u003e\u003cbr\u003eNot by default; app control works within Bluetooth range and Wi-Fi requires a separately purchased gateway.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long does the battery take to charge?\u003c\/strong\u003e\u003cbr\u003eThe built-in 400mAh battery takes about 3 to 4 hours to charge fully using the supplied USB A-to-C cable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many fingerprints can it store?\u003c\/strong\u003e\u003cbr\u003eThe lock stores up to 50 fingerprints locally to protect user privacy without cloud upload.\u003c\/p\u003e","brand":"DSJJBLL","offers":[{"title":"Default Title","offer_id":48252611756251,"sku":"B0F12GXV34","price":38.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61FAx3hMTRL._AC_SL1500.jpg?v=1778225287","url":"https:\/\/gearmusthave.com\/products\/fingerprint-door-lock-black-smart-biometric-door-knob-1-pack","provider":"GearMustHave","version":"1.0","type":"link"}