Feature:1. SAFETY USE: The fiber optic tester adopts nanotechnology, with multiple electrostatic protection and a light port protection device, safe to use.2. HIGH PERFORMANCE CHIP: The fiber optic pen adopts highly integrated chip that integrates power management, signal modulation and switch control.3. STRONG LIGHT: The fiber optic visual fault locator has strong red lighting, which could easily penetrate long distance optical fibers.4. ALUMINUM ALLOY BODY: The fiber optic cable tester adopts high strength aluminum alloy body, hard wearing and falling resistant.5. COMPACT SIZE: The visual fault locator is compact in size, can be easily placed in your pocket for easy carrying.Specification:Item Type: Visual Fault LocatorMaterial: Aluminum alloyBattery: 1.5V AA Battery x 2 (Not Included)Use: Fiber oPtic Communication DetectionBasic Parameter:Working Wavelength: 630nm to 670nm.Package List:1 x Visual Fault Locator1 x User Manual1 x Portable Bag1 x Lanyard