... range 3,Portable and rugged 4,20 hours working time Fiber Optic Cable Tester - Visual Fault Locator (5KM Range)Introducing the ... It finds breakpoints, poor connections, bending or cracking in fiber optic cable, faults in an OTDR dead zone and is used ... Chinavasion Product Reference:http://www.chinavasion.com/laser-gadgets/fiber-optic-cable-tester-visual-fault-locator-5km-range/ORhttp://www.chinavasion ...