1,Anti Static: Fiber optic visual fault locator adopts nanotechnology, multiple electrostatic protection, with optical port protection device. 2,Fault Detection: Fiber light tester is connected to the optical interface and can be used to detect fiber faults when single mode or multi mode fiber is inserted. 3,Three Modes: Fiber optic power meter has three working modes: constant light, fast flash, slow flash, and constant power output. 4,Pen Shaped Design: The visual fault locator adopts a pen shaped design, which is easy to use and carry, and is coupled by optical fiber to ensure optical power. 5,Aluminum Alloy Shell: Fiber fault locator shell is made of aluminum alloy, which is sturdy and durable. It is driven by a constant current source and can emit a red light. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.