Sunwin TL532 20mW Visual Fault Locator Tester Meter For Engineering Maintenance It is specially designed for field personnel who need an efficient and economical tool for tracing,fiber routing and continuity checking in an optical netwerk during and after installation. Test for both single-mode and multi-mode cables with optional 2.5mm fiber optic(Standard) connectors to 1.25mm adapter(Optional) High effective power circuits allow for stable laser power,Operates in both CW(Continuous wave) and pulse mode Easy to check fiber faults with visual red laser light,Universally connector for test different ST,SC,FC interfaces