{"product_id":"k-c15-50km-visual-fault-locator-pen-650nm-fiber-optic-cable-tester-1","title":"K-C15 50KM Visual Fault Locator | 650nm Fiber Optic Tester","description":"\n\u003ch2\u003eK-C15 50KM Visual Fault Locator Pen – 650nm Fiber Optic Cable Tester\u003c\/h2\u003e\n\u003cp\u003eThe K-C15 Visual Fault Locator is the go-to tool for fiber optic technicians who need fast, reliable cable inspection in the field. Whether you're working on FTTH installations, telecom networks, data centers, or LAN projects, this compact pen-style tester emits a bright 650nm visible red laser to quickly pinpoint break points, poor connections, excessive bends, and continuity issues across distances up to 50KM.\u003c\/p\u003e\n\u003cp\u003eWith its USB Type-C rechargeable battery, universal 2.5mm interface, and three operating modes, this VFL tester is ready for professional and everyday fiber maintenance tasks. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e50KM Rated Test Distance:\u003c\/strong\u003e Engineered for long-distance optical fiber inspection — ideal for large-scale telecom and network projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e650nm Visible Red Laser:\u003c\/strong\u003e Bright red light makes fiber faults — breaks, bends, damaged connectors — easy to spot. Output wavelength: 650nm ±10nm.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree Operating Modes:\u003c\/strong\u003e Simple sliding switch with CW (continuous light), GLINT (blinking light), and OFF positions for versatile fault detection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2.5mm Universal Interface:\u003c\/strong\u003e Compatible with SC, FC, and ST connectors. LC connector support available with an optional adapter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Type-C Rechargeable:\u003c\/strong\u003e Built-in rechargeable battery — just plug in via USB-C to top up. No disposable batteries needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePen-Style Portable Design:\u003c\/strong\u003e Textured anti-slip grip, compact form factor — fits easily in a tool bag, pocket, or the included protective pouch.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtective Dust Cap:\u003c\/strong\u003e Yellow cap shields the optical interface from dust and debris when not in use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSuitable Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFiber optic cable continuity testing\u003c\/li\u003e\n  \u003cli\u003eFiber break point detection\u003c\/li\u003e\n  \u003cli\u003eOptical connector inspection\u003c\/li\u003e\n  \u003cli\u003eFTTH installation and maintenance\u003c\/li\u003e\n  \u003cli\u003eTelecom network maintenance\u003c\/li\u003e\n  \u003cli\u003eData center fiber inspection\u003c\/li\u003e\n  \u003cli\u003eLAN and optical communication projects\u003c\/li\u003e\n  \u003cli\u003ePatch panel troubleshooting\u003c\/li\u003e\n  \u003cli\u003eFiber bending and leakage inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnect the Fiber:\u003c\/strong\u003e Remove the protective cap and plug the fiber connector into the tester's 2.5mm interface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelect Working Mode:\u003c\/strong\u003e Slide the switch to CW for continuous light or GLINT for blinking light.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocate the Fault:\u003c\/strong\u003e Observe the fiber cable — visible red light leaking from the cable indicates a break, bend, crack, or poor connection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Off After Use:\u003c\/strong\u003e Return the switch to OFF and replace the protective cap.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e K-C15\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Visual Fault Locator\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Test Distance:\u003c\/strong\u003e Up to 50KM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Wavelength:\u003c\/strong\u003e 650nm ±10nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Modes:\u003c\/strong\u003e CW \/ OFF \/ GLINT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e 2.5mm Universal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Connectors:\u003c\/strong\u003e SC \/ FC \/ ST\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLC Compatibility:\u003c\/strong\u003e Requires optional adapter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharging Port:\u003c\/strong\u003e USB Type-C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e Built-in rechargeable battery\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Design:\u003c\/strong\u003e Portable pen style\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrip:\u003c\/strong\u003e Textured anti-slip surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Yellow\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Visual Fault Locator Pen (K-C15)\u003c\/li\u003e\n  \u003cli\u003e1 × USB Type-C Charging Cable\u003c\/li\u003e\n  \u003cli\u003e1 × Wrist Strap\u003c\/li\u003e\n  \u003cli\u003e1 × Protective Carrying Pouch\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Safety Notes\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eDo not look directly into the laser output.\u003c\/li\u003e\n  \u003cli\u003eDo not point the laser toward people or animals.\u003c\/li\u003e\n  \u003cli\u003eKeep the protective cap closed when the tester is not in use.\u003c\/li\u003e\n  \u003cli\u003eClean the fiber connector before testing for more reliable results.\u003c\/li\u003e\n  \u003cli\u003eMaximum testing distance depends on fiber type, cable quality, connector loss, and environmental conditions.\u003c\/li\u003e\n  \u003cli\u003eLC connector requires a compatible adapter (not always included — check variant).\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eLooking for other precision testing and measurement tools? Check out our \u003ca href=\"\/products\/25-in-1-precision-magnetic-screwdriver-set-pro-repair-tool-kit\"\u003e25-in-1 Precision Magnetic Screwdriver Set\u003c\/a\u003e for detailed repair work, or browse our \u003ca href=\"\/products\/waterproof-cable-gland-set-pg7-pg9-nylon-connectors-10-pack\"\u003e10-Pack Waterproof Cable Glands PG7\/PG9\u003c\/a\u003e for secure cable connections in any environment.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What fiber connectors is the K-C15 Visual Fault Locator compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The K-C15 uses a standard 2.5mm universal interface and is directly compatible with SC, FC, and ST fiber connectors. For LC connectors, you will need an optional LC adapter. Please confirm whether the adapter is included in your selected product variant before ordering.\u003c\/p\u003e\n\u003ch4\u003eQ: How far can the K-C15 Visual Fault Locator detect faults along a fiber optic cable?\u003c\/h4\u003e\n\u003cp\u003eA: The K-C15 has a rated test distance of up to 50KM. Keep in mind that actual visible detection distance may vary depending on fiber loss, connector condition, ambient lighting, and the overall installation environment. It is designed to handle long-distance telecom and FTTH inspection tasks.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I charge the K-C15 Visual Fault Locator?\u003c\/h4\u003e\n\u003cp\u003eA: The K-C15 features a built-in rechargeable battery with a USB Type-C charging port. Simply connect the included USB Type-C cable to any suitable USB power source (wall adapter, power bank, laptop, etc.) to charge the device. This eliminates the need for disposable batteries, making it more convenient for field use.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What fiber connectors is the K-C15 Visual Fault Locator compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The K-C15 uses a standard 2.5mm universal interface and is directly compatible with SC, FC, and ST fiber connectors. For LC connectors, you will need an optional LC adapter. Please confirm whether the adapter is included in your selected product variant before ordering.\"}}, {\"@type\": \"Question\", \"name\": \"How far can the K-C15 Visual Fault Locator detect faults along a fiber optic cable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The K-C15 has a rated test distance of up to 50KM. 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