Amazon.com: Visual Fault Locator 30mw 30km, Red Light Pen Kit for Fiber Network Cable Test, VFL Fiber Optic Cable Tester Detector Meter with Universal 2.5mm Adapter for FC SC ST LC Connectors (
Amazon.com: RGT Mini Visual Fault Locator 30KM Fiber Optic Cable Tester/VFL for FC,SC,ST & LC Adapter : Electronics