Visual Fault Locator is for Finding the breakpoint, bending or cracking, ... the fault of OTDR dead zone VFL-10 Pen-type Visual Fault LocatorApplicationsFinding the breakpoint, bending or crackingFinding the fault of ... (°C) -20~+80Dimension(mm) ¢24X170Weight(Including battery) 160g Pen-type Visual Fault Locator